 The Throne Room, the Guard Room and the Room of Goddess Diana are decorated with murals by artist such as Ciryllo Wolkmar Machado, Bernardo Oliveira Góis and Vieira Lusitano.The church is built in the form of a Latin cross with a length of 63 m. It is rather narrow (16.5 m), an impression accentuated by the height of its nave (21.5 m).The vestibule (Galilee porch) contains a group of large sculptures in Carrara marble, representing the patron saints of several monastic orders.