Although they arrived in Quito in 1541, the Dominicans started to build their own temple in 1580, using the plans of Francisco Becerra, and under his direction. The work was completed in the first half of the 17th century. Inside the church are valuable structures, such as the neo-Gothic main altar. This was installed in the late 19th century by Italian Dominicans. The roof of the Mudéjar style church features paintings of martyrs of the Order of Saint Dominic. The roof of the nave is supported by a pair-and-knuckle frame, decorated inside by tracery. In the museum on the north side of the lower cloister, there are wonderful pieces by great Quito sculptors such as the Saint Dominic de Guzmán by Father Carlos, the Saint John of God by Caspicara, and the Saint Thomas Aquinas by Legarda. Another Baroque masterpiece that still stands today, is the Chapel of Nuestra Señora del Rosario, a recognizable architectural icon of Quito. This chapel was built next to the church. The largest fraternity in the city of Quito was founded in this chapel.