Warren Howard Hayes (1847–1899) was a leading designer of churches in the United States and Canada during the late 19th century. Hayes' work holds a significant place in its association with the "Social Gospel" movement. He is credited with some of the earliest use of the "diagonal auditorium" plan and the vast majority of his churches uncovered to date are centered on the diagonal auditorium design with fan shaped pew arrangements and, to assure excellent acoustics, the seating sloping toward the pulpit and domed ceilings. As noted at the opening of the Rockville Ct. Congregational Church: