"U" is for Unitarian Church (Charleston). Located at 6 Archdale Street, the Unitarian Church has long been considered one of the city’s most exceptional buildings. In 1772, construction began on a new church building to serve as a house of worship for the city’s Unitarian congregation, what had grown out of the Congregational Church on Meeting Street. In 1852, the building was enhanced with Gothic-revival features. Constructed of stuccoed brick, the church features a three-bay façade, a crenellated tower, false buttresses, tracery, and compound piers. The central bay facing Archdale Street boasts an expansive lancet-arched window with hood mold. The interior includes exquisite fan vaulting—said to have been inspired by the interior of the Henry VII chapel at Westminster Abbey. In 1978, the Unitarian Church in Charleston was designated a National Historic Landmark.