At the heart of Rio de Janeiro's downtown, an empty square with a dry fountain and an underground parking. There was located the Monroe Palace, that once housed the Senate, and was mysteriously demolished forty years ago. A history of sabers and lions, military and architects, past and future.

The clandestine congress of the National Union of Students, held in October 1968, resulted in the collective arrest and registration of 700 students who opposed the dictatorship.