Buildings

Ossuary

The Ossuary is a large Circle of Ossus structure used in the original game’s final campaign act. It belongs to a scenario faction and is not a normal building that a skirmish player can add to a technology tree.

APPLIES TO Original game campaign content; scenario object in Definitive Edition
Ossuary in Age of Empires III
Ossuary
IN-GAME VALUES

Recorded values

Structure
8,500 hit points · 26 line of sight · 6x6 footprint

Function & construction

The scenario object has 8,500 hit points and 26 line of sight. Its role is tied to Act III: Steel and Circle of Ossus missions; its appearance and durability do not mean it trains units or can be constructed by a standard civilization.

Placement & timing

In the campaign, treat an Ossuary as a mission objective or enemy strongpoint only when the briefing identifies it. In the Scenario Editor it can be placed as a scenario building, but it is not ordinary economic or military infrastructure.

Campaign objective structure

The Circle of Ossus Ossuary is an Act III: Steel scenario object with 8,500 hit points and 26 line of sight. It is not a standard building, does not represent ordinary unit production, and cannot be added through a skirmish technology tree. Follow the mission objective to determine whether it is a target or protected landmark.

The Circle’s Havana stronghold

In Act III: Steel, the Ossuary is the central Circle of Ossus fortification in Havana. It is protected by three Fixed Gun turrets, walls, special Outposts, Barracks, Artillery Foundries and cannon forces. The scenario’s American allies can help, and building south of Havana near Amelia’s landing area keeps the player’s base away from the first major enemy wave. Monitors can engage the Fixed Guns from the sea; once those defenses are removed, they can support the land assault. These are mission tactics for the campaign structure, not general building rules.