This impressive art nouveau mansion (1912) is actually three independent buildings around a stone courtyard. It was designed by architect Alejandro Christophersen and boasts marble staircases, grandiose dining rooms and a garden containing a chunk of the Berlin Wall. A small but good museum displays pre-Columbian artifacts from the northwest, along with some paintings by Latin American artists. Free tours happen at 3pm on Thursdays (bring ID), but can be suspended at any time. Enter via Esmeralda 1231.
Originally built for the powerful Anchorena family, Palacio San Martín later became the headquarters of the Foreign Ministry; today it’s used mostly for official purposes.
