The Civic Citadel may refer to three different buildings in Grand Theft Auto IV and Grand Theft Auto: Chinatown Wars, all situated in City Hall, Algonquin in Liberty City: Two skyscrapers and Liberty City's city hall. This has caused confusion as to which building is actually known as the Civic Citadel, and it is likely that the name is used liberally by the developer without consideration of consistency.
As city hall
During "Entourage", the player is instructed to drive Bobby Jefferson to the "Civic Citadel", which is revealed to be Liberty City's city hall (being based close to scale on the real-life New York City Hall building). This is the only instance where the building is referred as such.
As the Woodworld Building
The Civic Citadel name is also used to refer to a skyscraper further south from city hall, clearly based off Woolworth Building in New York City. While the building's entrances reveal it could be known as the Woodworld Building, hard copy maps reveal that a "Civic Citadel" is located on the very spot of the building, on a block bordered by Diamond Street, Calcium Street, Union Drive West and Liberty Lane.
As the Manhattan Municipal Building replica
The building to the east of city hall resembling the Manhattan Municipal Building has also been referred to as the Civic Citadel. During one of Brucie's helicopter rides, he tells the player to fly to the Civic Citadel, and the marker that appears is right in front of this building. Once the player arrives there, the camera focuses in on this building, suggesting that this building is the Civic Citadel.