Chapel of the Immaculate Conception in San Diego, California, is a California Historical Landmark No. 49 listed on March 6, 1935. It was built in 1850 as the adobe house of John Brown. The house was converted to a church building by Don José Aguirre in 1858. From 1866 to 1907 missionary Father Antonio D. Ubach was parish priest at Chapel of the Immaculate Conception. The Works Progress Administration rebuilt the Chapel of the Immaculate Conception in 1937. The Chapel of the Immaculate Conception is located at 3950 Conde Street in Old Town, San Diego.