The building, formerly part of the Convent of Santa Inés, is considered to be a mix of styles between Mexican Baroque and Neoclassical.[1] The church has two portals, one dedicated to Saint Agnes and the other to the Apostle James the Great.Some of these depict the life of Saint Agnes and others show images of the nuns of the convent with their benefactors, Don Diego Caballero and Doña Inés de Velasco.[3] Its dome is decorated with tiles laid in a strip design and made to look like rebozos, a type of indigenous shawl.[2] Mexican painters Miguel Cabrera and José de Ibarra are interned in altar here.