Hall of the two Sisters. This hall got its name from the two very beautiful white marble slabs laid as part of the pavement. There is a fountain in the middle of this hall, and the roof —a dome honeycombed with around 5000 tiny cells which are all different, it is a magnificent example of the so-called "stalactite vaulting" of the Moors. The most impressive part of the hall is the beautiful and perfect dome of mocarabes. Its lighting was carefully considered and it receives light from small windows.