Passage: Coeur Défense was built in 2001, replacing the former Esso Tower, the first building of the old generation to be destroyed in La Défense. Cœur Défense is a large complex made of two main bodies connected to one another by a smaller body and seating on a wide basis made of several smaller bodies. The edges of all bodies are rounded. The cladding is white, with large windows. An electronic system monitors white blinds which can be drawn or opened all together at the same time.

Question: What did the Coeur Defense building replace when it was built?
Esso Tower