Rome, Indiana Jones and the Great Circle Map

An interactive map presenting all locations available in the DLC The Order of Giants for Indiana Jones and the Great Circle. These areas become accessible after you receive the quest "A Mystery Begins", which is unlocked once the zeppelin arrives at the Vatican and you meet Gina Lombardi.

Markers on the map

Points of interest

Signposts

Signposts allow you to fast travel between them. In order to be able to select a specific signpost as a destination, you must first unlock it by reaching it on foot.

Cloaca MaximaYou will only be able to use it after reaching the Mithraeum signpost. Allows you to fast travel to: Mithraeum The Tiber River Via Giulia
MithraeumOnce you get here, you will be able to fast travels between signposts in Rome. Allows you to fast travel to: The Tiber River Via Giulia Cloaca Maxima
The Tiber RiverYou will only be able to use it after reaching the Mithraeum signpost. Allows you to fast travel to: Mithraeum Via Giulia Cloaca Maxima
Via GiuliaYou will only be able to use it after reaching the Mithraeum signpost. Allows you to fast travel to: Mithraeum The Tiber River Cloaca Maxima

Adventure Quests

Adventures are the main story quests where your objective is to solve the mystery of the Great Circle.

The Order of GiantsObjectives: Find the Secret Chamber - According to Father Ricci, Pope Paul IV built a secret chamber beneath the Casina, or Villa Pia. He thinks the helmet of the giant "Nameless Crusader" is in that chamber.

Chapter Notes

Chapter Notes, Gizeh. Chapter notes are documents or photos related to the adventure you must complete to uncover the mystery of the Great Circle. They contain all sorts of related interesting info. Collecting each of them is not mandatory but is worthwhile as it provides additional adventure points.

Battle of La ForbieNote.
Blackshirt NoteNote. In the room on the third floor.
Blackshirt OrdersNote.
Blackshirt Search OrderNote.
Boat Request
Building Instructions
Burned PaperNote.
Code to Safe
Costume Shop ReceiptNote.
Crusader's Diary
Dead Blackshirt's LetterNote.
DiMaggio's Note
Dr. Barbieri's ResearchNote.
Giants Arriving in RomeNote.
Gladiator Shrine Solution
Magician Card
Mithras Born from a Rock
Nephilim OrdersIn the Crusader Helmet.
Nero's FavoriteNote.
Note about Relief
Notes on Mural
On the Tauroctony
Protection Instructions
Pump Room RequestNote.
Safe InvoiceIn Ricci's basement after coming back with all cylinder pieces.
Skeleton's NoteNote.
The Monster's Gate Solution
The Tomb of Gibborim Solution
The Water Serpent Solution
Theodorus' Confession
Ventura's Letter
Water Serpent BlueprintsNote.

Chapter Photos

Chapter Notes, Gizeh. Chapter notes are documents or photos related to the adventure you must complete to uncover the mystery of the Great Circle. They contain all sorts of related interesting info. Collecting each of them is not mandatory but is worthwhile as it provides additional adventure points.

Bear Gladiator
Boar Gladiator
City of Antioch
Crusader Armor
Crusader Cross Mural
Emperor Nero
Fountain StatueYou can take a photo while standing on the bridge.
Hands of Faith
Headless Gladiator
Junia Statue
Lion Gladiator
Mediterranean Map Mural
Nero Bust
Peculiar Wall
Ring of Sigils
Shield Mural
Sword Mural
The Holy Expeditions
The Monster's Gate
The Nameless Crusader
Tiger Gladiator
Trinity Mural
Water Serpent Fountain

Discoveries

Discoveries, Gizeh. Discoveries are activities that span over greater sections, some of them throughout the entire game. To complete one of these you will have to explore the world to find something that relates to the discovery.

A World of KnowledgeHow to start: Find any of the adventure books located in the Rome area. Objective: Learn new abilities by collecting Adventure Books and taking a moment to study them. Hard Crust Vitamins Rome Guide
Mithraic ArtifactsHow to start: Find any of the Mithraic artifacts. Objective: Search secret places and collect all the Mithraic artifacts (x7). Heliodromus Artifact Leo Artifact Perses Artifact Miles Artifact Pater Artifact Nymphus Artifact Corax Artifact

Field Notes

Field Notes, Gizeh. Interesting notes and photographs gathered while out on the field. 58 such notes and photographs can be found in The Vatican.

Book Presentation LeafletOn a table with books standing on the street.
Claudius' DiaryIt lies on the ground in the corner of the side room.
Colosseum ToursOn a stone bench standing in the square by a round flower bed.
Cult of the Eternal SerpentComic Book. On the floor, between the corpses of two soldiers.
Death CardOn a church pew in a side room of the villa.
Digger's LetterOn the barrel standing in the corner against the wall.
Disappearances ArticleOn the crates, in the side tunnel.
Fascist PropagandaOn a wooden crate located on the pier.
Food for BeastsIn one of the cells, on the ground.
Garum RecipeA note lying on a rack with wooden crates.
Gladiator EarningsIt lies on the floor, next to the signpost.
Gladiator Medical StatusOn the ground, in a room on the upper level.
Gladiator Puls RecipeOn a stone slab, in a room on the upper level.
Herbal CureOn the floor, behind the statue.
Leonardo's LetterOn the table inside the hut.
Love Letter DraftYou can get here through the Uderwater Passage. You need a Rebreather to get here.
Message in a BottleTo get it, smash the bottle you can find here.
Miles' LetterIn a hidden, dark corridor behind the Burnable Wall.
Mithraic DegreesA note lying on the table.
Mithras Guard RotationIt sits on a stone tomb in a side room.
Nero's LetterIn Ricci's Safe. You will be able to look inside once you bring him the three fragments of the cylinder.
October FeastIn a crate of bottles standing against the wall.
Ode to NeroOn the ground, next to the skeleton.
Oenogarum RecipeNote. In the room on the second floor you can get to by jumping from the scaffolding onto its balcony.
Sewer ToursOn top of the barrel. You can get here via a passageway, the entrance to which is located on the upper level, on the west side.
Titans of the ArenaComic Book. On a bench, on a wooden platform under the bridge.
Trattoria AdA note pinned to the wall of the building.
Vadstena PostcardOn one of the round tables standing in the square.

Field Photos

Field Notes, Gizeh. Interesting notes and photographs gathered while out on the field. 58 such notes and photographs can be found in The Vatican.

A Tree
Ancient Flame Graffiti
Bull Graffiti
Bull Painting
Castel Sant'Angelo
Dangerous Hole
Father Ricci's Library
Intriguing Architecture
Mithras Born from a Rock
Mithras Slaying the Bull
Mystery Graffiti
Palazzo Ricci
Palazzo Ricci Back DoorYou can take a photo from one of the balconies of the building.
Palazzo Ricci Courtyard
Pio the Parrot
Sewer CatUse the Grappling Point to get to te alcove where the cat is.
Sewer Entrance

Adventure Books

Adventure Books allow you to learn new Abilities to tackle harder challenges. Adventure Books are divided into a few categories depending on which kind of Ability you can learn from it: Survival, Fitness, Packing, Brawling, and Combat. You can also collect Map Guides which are listed under the Exploration category. These will unlock important information about the locations that you visit and place markers on maps.

Hard CrustIn the Collegial Hall Safe you need to open to complete the mystery "A Collegial Mystery". Category: Combat Description: Temporarily inflict more damage while charged by hearty, whole-grain bread. Adventure Points To Unlock: 1000
Rome GuideIt lies on metal rails, next to a hole in the wall in Cloaca Maxima that you will have to pass through. Category: Exploration Description: An informative guidebook to things of interest that can be discovered in Rome.
VitaminsCategory: Combat Description: Boosted by fruity vitamins incoming damage is temporarily reduced. Adventure Points To Unlock: 1000

Lost Artifacts

Finding all the lost artifacts is the objective of the "Lost Artifacts of Europe" discovery.

Corax ArtifactRelated discovery: Mithraic Artifacts. Description: A statuette of a raven, which is the symbol of Corax, the first Mithraic grade of initiation.
Heliodromus ArtifactRelated discovery: Mithraic Artifacts. Description: A radiating crown, the symbol of Heliodromus, the sixth Mithraic grade of initiation.
Leo ArtifactRelated discovery: Mithraic Artifacts. Description: A Batillum, an ancient Roman fire shovel. This symbolizes Leo, the fourth Mithraic grade of initiation.
Miles ArtifactRelated discovery: Mithraic Artifacts. Description: A Coolus bronze helmet, the symbol of Miles, the third Mithraic grade of initiation.
Nymphus ArtifactRelated discovery: Mithraic Artifacts.It's a reward form completing the mystery "A Bull in the Sky". Description: A small lamp. It's the symbol of Nymphus, the second Mithraic grade of initiation.
Pater ArtifactRelated discovery: Mithraic Artifacts. Take the torch from the nearby jug, light it, and then place it in the statue's hand. Description: A ruby ring, the symbol of Pater, the seventh Mithraic grade of initiation.
Perses ArtifactRelated discovery: Mithraic Artifacts. It's a reward form completing the mystery "A Tale of Wine Making". Description: A sickle, the symbol of Perses, the fifth Mithraic grade of initiation.

Mystery Quests

Mysteries, Gizeh. Mysteries are shorter and sometimes quite challenging activities, and will give you adventure points when they have been completed, in addition to a variety of different smaller rewards.

A Bull in the SkyHow to start: Put your hand in the lion's mouth and turn the handle inside. Objective: A room hidden behind the relief with the gaping mouth. There is a series of pillars with stars on them, and weights on the floor. Solution: Place 5 weights on the pedestals. The weights have different weights, which can be determined by the number of dots on them. The numbers in the screenshot below indicate which weight should go on which pedestal. Reward: 100 Adventure Points + Nymphus Artifact.
A Collegial MysteryHow to start: Read the Federico's Letter or Alessandro's Letter Objective: Find the Secret Document - A priest is coercing a colleague to steal a confidential document. Might be worth looking into. Solution: According to the notes, clues to the safe combination can be found on the paintings on the villa's upper floor. The combination is: 1-2-2-2, as there are 12 apostles, 2 cherubs, and 2 beasts in the paintings. Use it to open the Collegial Hall Safe and collect two notes: Alessandro's Note and Discretionary Assessment. Summary: The safe in the collegial hall contained the confidential document that the priest Federico asked Alessandro to get for him. Reward: 100 Adventure Points + Hard Crust adventure book.
A Tale of Wine MakingHow to start: Collect one of the tablets: Grow, Ferment, Process, Harvest, or Plant. Objective: A curious mural with several missing pieces. Maybe try to find all the pieces and put them in the right spot? Solution: Place the tablets on the mural as shown in the screenshot below. Summary: The mural told the story of how to make wine. Solving it revealed a peculiar artifact. Reward: 100 Adventure Points + Perses Artifact.

Mystery Notes

Notes that are related to the mysteries.

Alessandro's LetterRelated mystery: A Collegial Mystery.
Alessandro's NoteRelated mystery: A Collegial Mystery.
Discretionary AssessmentRelated mystery: A Collegial Mystery.
Federico's LetterRelated mystery: A Collegial Mystery.
Mural NoteRelated mystery: A Tale of Wine Making.
On Astrological SymbolismRelated mystery: A Bull in the Sky.

Puzzles

Puzzles and riddles that need to be solved to push the game storyline forward, gain access to new places, etc.

Gladiator ShrinePick up the Giant Blade and insert it into the Statue's Hand. Whip‑yank the Raised Sword to release the rolling flaming ball. Your goal is to guide the ball through four gladiator statues in a specific order. Murals around show the correct order: Lion - Boar - Tiger - Bear. You have three track pieces (two curved, one straight). You must place them on intersections so the ball rolls along a path visiting each statue in the correct order without falling. Since there are only three pieces and you will pass through some intersections multiple times, you have to rearrange them while the ball is rolling. Once the ball hits all four statues in order, a statue of Emperor Nero will lower its arm and you can pick up the Cylinder Piece (Shrine of the Gladiator) from its hand.
Monster's GateThere are five tiles around on the ground need the gate. Pick them up and place them back into their correct slots. Fitting them in completes the mural and reveals a hidden Wooden Cog. Pick up this cog and install it on the podium in front of the mural. Look at the Roman numeral next to each animal on the mural: Snake = II, Horse = III, Raven = V, Scorpion = VI. For each animal repeat steps below: Place the Cylinder Roll into the Cylinder Roll Slot (Console) and rotate it so that the number of one of the animals is at the top. Circles on mural will also rotate. Note the symbol that appears on the mural on the inner circle next to animal symbol. Around the room are four stone pillars, each with one of the four animals carved near the top. At the base of each pillar is a rotatable section with several symbols on its faces. For each animal pillar, rotate the cube until the symbol you found on the mural for that animal is directly underneath the carving. Once all four pillars have the correct symbol beneath their animal, go back to the mural and insert the Cylinder Roll into the Cylinder Roll Slot (Mural) and turn it.
Ricci's Library BookshelfPull the books in the following order: Circle - Crown - Triangle. A tip regarding the order can be found on the Burned Paper.
The Water SerpentYou must use the Serpent Wrench to redirect the water between the containers in order to lift all four platforms and then fill all the containers with water. To lift a platform, redirect the water to the snake's mouth on the platform. In the case of one of the platforms, you also need to remove the blockage from the mechanism. How to redirect the water in all five cases is shown in the image and video below.
Tomb of GibborimThis puzzle is a complex challenge requiring you to use four scepters (Cross Scepter, Shield Scepter, Sword Scepter, and Trinity Scepter) to rotate floor discs based on clues from murals. Below you will find complete step-by-step instructions on how to complete this puzzle.

Key Items & Objects

Various other items that are useful during the adventure.

Cross ScepterRelated puzzle: Tomb of Gibborim.
Crusader FigurineIn a secret compartment that opens when you press the Holy Expeditions badge on the mural. Related adventure: The Order of Giants.
Crusader HelmetRelated adventure: The Order of Giants. Inside you will find the Nephilim Orders and the Crusader Helmet Key.
Cylinder Piece (Shrine of the Gladiator)Another of the three cylinder pieces you need to collect. It's a reward for completing the Gladiator Shrine puzzle.
Cylinder Piece (Tomb of Gibborim)Another of the three cylinder pieces you need to collect. It's a reward for completing Tomb of Gibborim puzzle.
Cylinder Piece (Tomb of Junia)The first of the cylinder pieces you need to collect.
Cylinder RollRelated puzzle: Monster's Gate.
Dropped LetterPick up the letter lying on the floor and put it in the mailbox so that it doesn't fall out, and you will receive 10 adventure points.
Dynamite x2
Dynamite x2
Dynamite x3In the Storage Shed Safe.
FermentRelated mystery: A Tale of Wine Making.
Giant BladeRelated puzzle: Gladiator Shrine. Place it in the Statue's Hand.
Golden Apple
GrowRelated mystery: A Tale of Wine Making.
HarvestRelated mystery: A Tale of Wine Making.
Large HammerYou can use it to break down the Weak Wall.
Large HammerYou can use it to break down the Weak Wall.
Large MaceYou can use it to break down the Weak Wall blocking an access to the Corax Artifact.
Pet the CatAchievement. In the room on the third floor.
PickaxeYou can use it to break down the Weak Wall blocking an access to the Miles Artifact.
PlantRelated mystery: A Tale of Wine Making.
Pope FigurineIn a secret compartment that opens when you press the Holy Expeditions badge on the mural. Related adventure: The Order of Giants.
ProcessRelated mystery: A Tale of Wine Making.
Safe CombinationCorrect combination (5-7-4-2) for opening the Cloaca Maxima Safe.
Serpent WrenchRelated puzzle: The Water Serpent.
Serpent WrenchThis wrench got stuck in the mechanism that lifts one of the platforms. At some point in solving The Water Serpent puzzle, you will have to remove it with your whip.
Shield ScepterRelated puzzle: Tomb of Gibborim.
Sword ScepterRelated puzzle: Tomb of Gibborim.
The Sword of GibborimRelated puzzle: Tomb of Gibborim.
TorchesA jug with torches. Use one of them to get the Pater Artifact.
Trinity ScepterRelated puzzle: Tomb of Gibborim.
Weight (1)
Weight (3)
Weight x3 (2) (2) (1)
Wooden CogRelated puzzle: Monster's Gate. To open the cache containing this cog, you must collect the panels lying on the ground and place them in the appropriate slots on the mural. You must match the fragments to complete the images of the animals.

Switches

Various types of switches, levers, pressure plates and other items that can be switched, shifted, etc.

Aethopolis SlotUse the Cross Scepter and turn it twice (180 degrees) in any direction. Related puzzle: Tomb of Gibborim.
Al-Mansur Castra SlotUse the Sword Scepter and turn it once to the right. Related puzzle: Tomb of Gibborim.
Antioch SlotPlace the Crusader Figurine here. Related adventure: The Order of Giants.
Apple Symbol Handle (3)Related puzzle: Tomb of Gibborim.
ChainPull this chain several times to bring the crane with the Grappling Point toward you.
ChainPull it several times to move the crane arm with the Grappling Point on it. When you release the chain, the crane arm will slowly begin to return to its previous position, so hurry and use the grappling point before it moves too far away.
ChainUse it several times to bring the Grappling Point closer to you.
Cross SlotRelated puzzle: Tomb of Gibborim.
Custodis Fastigium SlotUse the Trinity Scepter and turn it once to the right. Related puzzle: Tomb of Gibborim.
Cylinder Roll Slot (Console)Related puzzle: Monster's Gate. To use it, you must first install the Wooden Cog. Then use the Cylinder Roll to rotate it, allowing you to get clues about the correct symbols.
Cylinder Roll Slot (Mural)Once you have properly aligned the symbols on the columns, use the Cylinder Roll here and turn it to complete the puzzle and open the passage.
Halygast SlotUse the Cross Scepter and turn it twice (180 degrees) in any direction. Related puzzle: Tomb of Gibborim.
Hori Castrum SlotUse the Shield Scepter and turn it twice (180 degrees) in any direction. Related puzzle: Tomb of Gibborim.
Horse PillarRelated puzzle: Monster's Gate. You need to set it up as shown in the screenshot below.
Keys Symbol Handle (1)Related puzzle: Tomb of Gibborim.
LeverUse it to lower the cage so you can continue along its roof.
Lever (Shield Scepter Trial)Related puzzle: Tomb of Gibborim.
Lever (Trinity Scepter Trial)Related puzzle: Tomb of Gibborim.
Malum SlotUse the Trinity Scepter and turn it once to the left. Related puzzle: Tomb of Gibborim.
Nakhala Pagus SlotUse the Shield Scepter and turn it twice (180 degrees) in any direction. Related puzzle: Tomb of Gibborim.
Pugna SlotUse the Sword Scepter and turn it twice (180 degrees) in any direction. Related puzzle: Tomb of Gibborim.
Raised SwordRelated puzzle: Gladiator Shrine. You will be able to use it when you place the Giant Blade in the Statue's Hand. Pull it using the whip to release the rolling ball.
Raven PillarRelated puzzle: Monster's Gate. You need to set it up as shown in the screenshot below.
Rome SlotPlace the Pope Figurine here. Related adventure: The Order of Giants.
Rudera SlotUse the Sword Scepter and turn it once to the right. Related puzzle: Tomb of Gibborim.
Sancti Luciani Ecclesia SlotUse the Trinity Scepter and turn it twice (180 degrees) in any direction. Related puzzle: Tomb of Gibborim.
Scorpion PillarRelated puzzle: Monster's Gate. You need to set it up as shown in the screenshot below.
Shield Handle #1Related puzzle: Tomb of Gibborim.
Shield Handle #2Related puzzle: Tomb of Gibborim.
Shield Handle #3Related puzzle: Tomb of Gibborim.
Shield SlotRelated puzzle: Tomb of Gibborim.
Shield Symbol Handle (2)Related puzzle: Tomb of Gibborim.
Snake PillarRelated puzzle: Monster's Gate. You need to set it up as shown in the screenshot below.
Snake Symbol Handle (4)Related puzzle: Tomb of Gibborim.
Statue's HandRelated puzzle: Gladiator Shrine. Place the Giant Blade here.
Sword SlotRelated puzzle: Tomb of Gibborim.
Trinity SlotRelated puzzle: Tomb of Gibborim.

Locked Containers

Cloaca Maxima SafeSafe combination: 5-7-4-2. The correct combination is on one of the boxes in the side tunnel. Inside you will find the Leo Artifact.
Collegial Hall SafeSafe combination: 1-2-2-2. Related mystery: A Collegial Mystery.
Ricci's SafeSafe combination: 4-7-6-8. A hint about the combination can be found in note "Code to Safe". Related adventure: The Order of Giants.
Storage Shed SafeSafe combination: 1-2-3-4. You can find this combination in DiMaggio's Note.

Keys

Keys you can use to open some locked doors, gates, etc.

Crusader Helmet Key
Mithraeum Key
Ricci's Basement Key

Locked Passages

Various locked or blocked passages. Some of them can be opened with the right key. Some can only be unlocked from a certain side. Others can be unblocked by, for example, using a large hammer or setting them on fire.

Burnable WallYou can come back here once you have obtained the Lighter and set fire to the barrier.
Clerical DoorRequired key: Clerical Key.
GratingUse the whip to yank the gating open and make a passage.
Hidden PassageIt can be unlocked from the east side.
Locked DoorThe gate will be open when you are leaving the tomb.
Locked DoorIt can be unlocked from the south side.
Locked DoorIt can be unlocked from the east side.
Locked DoorIt can be unlocked from the north side.
Locked GateRequired key: Blackshirt Key.
Locked GateYou will unlock this gate on your way to get the Cylinder Piece (Tomb of Junia).
Locked GateIt can be unlocked from the east side.
Locked GateIt can be unlocked from the south side.
Locked GateIt can be unlocked from the west side.
Locked GateIt can be unlocked from the west side.
Locked GateThe gate will unlock when you are leaving the undergrounds of the shrine.
Locked GateIt can be unlocked from the north side.
Locked GateYou can open this gate by pulling out the pin located on its north side.
Locked GateIt can be unlocked from the north side.
Locked GateThis gate will open once you collect the Cylinder Piece (Shrine of the Gladiator).
Locked GateYou can open this gate by pulling out the pin located on its north side.
Locked GateYou can open this gate by pulling out the pin located on its east side.
Locked GateIt can be unlocked from the south side. You can get here via a passageway, the entrance to which is located on the upper level, on the west side.
Locked GateIt can be unlocked from the east side.
Locked GateThe gate will unlock when you are leaving the shrine.
Locked GateRequired key: Mithraeum Key.
Locked GateRequired key: Mithraeum Key.
Locked GateRequired key: Mithraeum Key.
Locked Gate (Shield Scepter Trial)Related puzzle: Tomb of Gibborim.
Locked Gate (Tomb of Gibborim Exit)It will open when you solve the Tomb of Gibborim puzzle.
Locked Gate (Trinity Scepter Trial)
Ricci's Basement DoorThe doors will be closed at a later stage of the game. Required key: Ricci's Basement Key.
Secret PassageThere is a small keyhole in the wall. You need to use the Crusader Helmet Key here.
Uderwater PassageTo unlock this passage and swim further, you will need the Rebreather.
Weak WallUse the Pickaxe to destroy it.
Weak WallTo destroy it, you can use the Large Hammer lying nearby.
Weak WallTo destroy it, you can use the Large Hammer.
Weak WallTo destroy it, you can use the Large Mace.

Ammunition Boxes

Additional ammunition for Indy's revolver. One box contains two bullets.

Repair Kits

With a repair kit you can repair broken weapons in your satchel.

Bandages

Using bandages restores your health.

Bread

Eating bread, such as cornetti, donuts, crackers and others boosts your total health temporarily.

Fruit

Eating fruit such as apples, oranges, lemons, figs and others gives you an additional stamina boost.

Map Transitions

Transitions between different sections of the map.

Cloaca Maxima
Cloaca Maxima
Cloaca Maxima
Cloaca Maxima
Cloaca MaximaThe passage is behind the bookshelf. It will take you down to the Ricci's basement in Cloaca Maxima. Required key: Clerical Key.
ColosseumBehind this door, the final battle of The Order of Giant DLC awaits you.
Hypogeum
Hypogeum (Lower Level)
Hypogeum (Lower Level)
Hypogeum (Lower Level)
Hypogeum (Lower Level)
Hypogeum (Upper Level)
Lower Mithraeum
Lower MithraeumYou cannot go back this way, you can only move down.
MithraeumThe gate will be opened by one of the cultists at a certain stage of the game.
Secret Chamber EntranceTo open this passage, you must take two figurines: Crusader Figurine and Pope Figurine, and place them in slots Antioch Slot and Rome Slot, respectively.
Shrine of the Gladiator
Shrine of the Gladiator (Lower Level)You can only go down using the rope, it's not possible to get back up this way.
The River Tiber
The River Tiber
The VaticanYou start here, it's also a way back to the Vatican.
The Water Serpent GateThe gate will open once The Water Serpent has been solved.
Tomb of Gibborim
Tomb of Junia
Via Giulia
Via GiuliaSewer manhole. You can only get through here once, during the main storyline of the game.