Cathedral of St. John the Devine, ca. 1913.

The massive Cathedral of St. John, the principal church of the Episcopal diocese of New York, is the largest church in the United States and one of the largest in the world.

Designed by the Heins & LaFarge firm in 1891, the Cathedral's construction began its long journey in 1892 when the first stone was laid. The design was transferred to the firm of Cram and Ferguson in 1911, when the crossing and eastern end of church was completed. The resulting change in architects caused the Cathedral's Nave to have a French Gothic influence while the sanctuary and choir taking a Romanesque Style.

The initial length of the cathedral was completed in 1941 (in part due to a colossal fundraising campaign amongst New Yorkers) and the cathedral was opened, marking a pause its construction that would last until 1979. The Very Reverend James Parks then spurred another round of construction and renovation, employing masons to continue the work. However, the great Cathedral remains unfinished, the last additions having been made in 2007, as its stone on stone construction is both expensive and painstaking. Even in its unfinished state, it remains one of the most important Anglican churches in the world.