The center of the city has colonial era constructions such as the Santo Domingo Monastery from the 16th century, which is also the main cathedral. The former monastery part of the cathedral complex houses the Casa de Cultura or cultural center. The monastery was remodeled for this purpose at a cost of 50,000 pesos, mostly to rehabilitate walls and ceiling vaults. This Casa de Cultura houses the Museo de Antropología e Historia Zapoteca del Istmo, which contains archeological and artistic artifacts from the region. The museum has halls dedicated to archeology, ethnographic studies, the history of the Mexican Revolution and the Reform War, as well as items related to religion, regional dress, housing and folk art. It also has a library.