 The building was officially opened on 14 March 1919 and began operating as a modern distribution centre for post, telegraphs and telephones.Following some architectural changes to the building’s exterior, such as the expansion of two floors and the street and pathway of Montalbán, it began to house municipal offices of the City of Madrid in 2007, moving its departments from the Casa de la Villa ("House of the City") and the Casa de Cisneros, which were both located in the Plaza de la Villa.This renovation of the building from the early twenty-first century also included a cultural area called "CentroCentro".