Boston-based architect Richard Bond designed St. John's Episcopal Church, a comparatively rare surviving example of early Gothic Revival. Two local building craftsmen, mason George C. Adams, who was responsible for a number of Charlestown's earliest brick rows, and his partner, carpenter John W. Mulliken, oversaw its construction. Adjacent to the church stands the Parish House (1870s, 27 Devens Street, NRD), originally designed by Ware and Van Brunt as a one-and-a-half-story chapel. A handsome example of the Stick Style, with dramatic dormer windows, the structure was raised in 1901 by P. C. Barnum with the insertion of a brick first story and converted to a parish house. Across the street is the former Harvard Primary School (1871–1872, 20 Devens Street, NRD), an early commission for Samuel F. J. Thayer. The High Victorian Gothic building with its characteristic tripartite facade replaced the earlier nearby grammar school on Harvard Street, which no longer met the town's expanding student population.