The Reina Sofía Palace of the Arts replaced the Communications Tower of the initial project. The building has sculptural forms.

This building has four rooms: Main (for opera), Aula Magistral, Auditorium (the largest room) and Martín y Soler Theater. It also has a room for exhibitions.

In principle it was going to be just a City of Sciences but, when this new building was added, it was renamed the City of Arts and Sciences.