 The present-day Saint John's Church, the parish's third and the second one built on the Georgia Street property, is the main structure in a group of parish buildings on the southwest corner of Georgia Street and Capitol Avenue.Diedrich A. Bohlen, principal and founder of the Indianapolis architectural firm of D. A. Bohlen and Son, designed the rectory (1863), church (1867–71), and a rectory addition (1878).Bohlen's son, Oscar, designed the twin spires and supervised their construction in 1893.