The Mosteiro de Sao Vicente de Fora (Monastery of Saint Vincent Outside the Walls) is a church and monastery complex located in the Alfama district of Lisbon, Portugal. The monastery was built in the 16th century on the orders of King Manuel I, as a way of honoring Saint Vincent, Lisbon's patron saint. The church was completed in 1629 and the monastery buildings added in the following years.

The church has a Renaissance facade and a Baroque interior, with elaborate altarpieces and a magnificent organ. The monastery, which is connected to the church, has a large cloister that is adorned with Azulejo tiles, depicting scenes from the life of Saint Vincent. The monastery also has a sacristy, library, and several chapels, including the Chapel of Saint Vincent, where the saint's relics are kept.

The monastery was once home to the Order of Saint Augustine and has been used as a royal palace and a military barracks over the years. Today, it is open to the public as a museum and tourist attraction. Visitors can explore the church, cloister, and museum, which houses a collection of religious artifacts and art, including paintings by 17th-century artist Francisco de Zurbaran. The rooftop terrace of the monastery also offers stunning views over the city of Lisbon.