San Martin Palace

Heritage Buildings
Museum

09 palacio sain martin buenos aires 1 poi grand

Emilie

Published on 17/03/2025

This point of interest is available as audio on the tour: Visit Buenos Aires, A stroll through the city’s beautiful neighborhoods

This imposing Beaux-Arts-style palace was built for Mercedes Castellanos, a local high-society lady who also funded the construction of the Basilica of the Blessed Sacrament. The building was completed in 1909 and became the property of the Argentine government in 1936, which turned it into the Ministry of Foreign Affairs. Today, it is mainly used for official events. If you’d like to see its interior and learn more about its history, you can book a free guided tour, available in Spanish only. You’ll see some amazing rooms and artwork by several 20th-century American artists.