In 1609, the Dominican Order built the Convento de Porta Coeli at the crest of a hill in what is now San Germán Historic District. During the 18th century the Convento was reconstructed and a church built next to it. The single nave church was constructed of rubble masonry with stucco surfaced walls and a wood truss roof.
A religious art and old architecture, the Convento de Porta Coeli church was restored by the Institute of Puerto Rican Culture, and is now a museum called the Museo de Arte Religioso.
In 1949 Ubaldino Ramírez de Arellano, Monseñor Mac Manus, Bishop of Ponce, Senator Santiago R. Palmer and others arranged for the church of Porta Coeli in San German to be sold to the Government of Puerto Rico for a dollar so that it would be responsible for its safekeeping and preservation.
After restoration by the Institute of Puerto Rican Culture, the church now houses the Museo de Arte Religioso. This is a museum of religious paintings and wooden carvings dating from the 18th and 19th centuries. The building was listed in 1976 on the U.S. National Register of Historic Places as “Convento de Porta Coeli”.