 Blesch designed the exterior, mixing Gothic and Romanesque styles, and Eidlitz designed the plain interior and the original openwork spires.The Episcopal congregation was so satisfied with the design that they rebuilt the church after a disastrous fire in 1865 following the same design, under Eidlitz' supervision.By that time the design was also influenced by Dr. Stephen Tyng, a new pastor hired for what had become a changing urban congregation, in a neighborhood largely filled with immigrants.