 In 1850, Aguirre joined William Heath Davis and Miguel Pedrorena (who was married to another Estudillo sister, Antonia) in an attempt to establish a new town, south of the existing town of San Diego and closer to the San Diego Bay.In 1858, Aguirre bought the land and paid for the construction of an adobe church in San Diego.At the time there were only private chapels (in Casa de Estudillo and Casa de Aguirre) since the Presidio church and the Mission church were both in ruins.