Brazil is going through a crucial moment in the international scenario. Both the World Cup 2014 and the Olympic Games in 2016 requires several changes throughout the country but particularly in Rio de Janeiro. Aiming at the requirements of these events, the project presented is originated from the mixed use: a convention center, a hotel, a business center, shops and apartments. All the aspects are very well integrated by the public square wich is the main feature of this project. It invites the public space into the private building and so it becomes an open block. Unique within a chaotic environment.