The history of a great project is usually the history of a great client; one who is willing to use architecture and to assume the risks involved in good ideas. The history of the corporate building for BANCODEUNO is a perfect example. This important bank in Mexico, decided to locate their headquarters in the landmark building of Mariano Escobedo and Campos Elíseos in Mexico City. For usoarquitectura, this project is very important for 2 main reasons: first, the excellent communication with the client and second, the opportunity to develop a project inside of a catalogued building designed by architect Augusto H. Alvarez in 1972.