Mission Concepcion, Catholic mission in San Antonio, United States

Mission Concepción is a stone church in San Antonio with a pale tan facade, its central section topped by a curved parapet between two square bell towers. Each tower rises in two tiers with arched openings and is capped by a small dome. A round window sits above an arched doorway framed by a projecting stone entry, with two smaller arched windows flanking it. To the right stand a lower rounded domed structure and a section of rough stone wall, with crumbling stone ruins in the foreground.

Franciscan friars founded the mission in 1711 in East Texas as Nuestra Señora de la Purísima Concepción de los Hainais, a base for evangelizing the Hasinai. In 1731 it was moved to San Antonio, onto land of the earlier Mission San Francisco Xavier de Nájera, and most of its residents were Pajalats speaking a Coahuiltecan language. Its church was built in 1755. The mission was secularized in 1794, abandoned by 1800, and the Battle of Concepción was fought here on October 28, 1835.

Catholic Mass is still held at Mission Concepción every Sunday, continuing worship that the Archdiocese of San Antonio has maintained since the Brothers of Mary arrived in 1855. The mission was secularized in 1794, when its lands were divided among the residents, and by 1800 it stood abandoned. Traces of the brightly painted frescoes that once covered the exterior and interior can still be seen on the weathered facade.

The church is still an active parish, with Catholic Mass held every Sunday, so visitors should time walks around the grounds outside service hours. The site lies within San Antonio Missions National Historical Park, and the church, convento and granary stand close together, making the core easy to cover on foot.

The church's western entrance is aligned to the setting sun, producing a double solar illumination inside on or around August 15, the feast of the Assumption of Mary. The effect recurs each year on that date.