A short, square Georgian church on Tremont Street, King's Chapel was founded in 1686 as the first Anglican parish in Puritan Boston — a deeply unpopular move at the time. After the Revolution the congregation reorganized as the first Unitarian church in the United States. The Anglican prayer book is still used, with Trinitarian language quietly excised.
The interior is one of the finest colonial church interiors anywhere: high white box pews, a wineglass pulpit, royal-governor's pew, and a set of communion silver donated by William III and Queen Anne, still used on Sundays. Self-guided tours are free; the paid tour includes the bell tower (the bell was cast by Paul Revere) and the small crypt below, where a few colonial families are still entombed.
Adjacent is the King's Chapel Burying Ground, the oldest in the city, with stones dating to the 1630s.