The visita or subordinate mission station of San Telmo may have been built in the years 1798-1800 by the Dominican

Dominican Order

The Order of Preachers , after the 15th century more commonly known as the Dominican Order or Dominicans, is a Catholic religious order founded by Saint Dominic and approved by Pope Honorius III on 22 December 1216 in France...

 missionaries based at Mission Santo Domingo.

When the geographer Peveril Meigs, III, investigated the area in 1926, he identified two areas on the Arroyo de San Telmo that had apparently been developed for agricultural use by the Dominicans: San Telmo de Arriba and San Telmo de Abajo, the latter being about 4 kilometers downstream to the southwest from the former.