The building has two levels with Doric pilasters on the lower level and Ionic pilasters on the upper level.

Inside, you can admire the neoclassical-style stairs and columns carved by Yaqui indigenous people, using stones obtained from Cerro de la Campana.

Its murals depict a significant part of the state's history, painted in 1980 and 1990 by renowned Sonoran artists Héctor Martínez Arteche, Teresa Moran, and Enrique Estrada.