Hartwell and Richardson designed a series of five Romanesque-style masonry churches between 1890 and 1894. Three—the Congregational Church in Wakefield (1890), the Congregational Church in Newtonville (1893), and the Unitarian Church in Somerville (1894)—are entirely granite construction. The Belmont Unitarian Church and the Winter Hill Congregational Church both date from 1890 and are also masonry but with wood-shingled upper sections. Winter Hill Congregational Church is the most architecturally picturesque of the five. Constructed of a variety of local stone types, the church features a nave with twin turrets and a shingled gable end flanked by a tower. The upper section of the stone tower has a shingled belfry whose design the architects duplicated in granite for their Newtonville church.