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King's Chapel is an American independent Christian unitarian congregation affiliated with the Unitarian Universalist Association that is "unitarian Christian in theology, Anglican in worship, and congregational in governance." It is housed in what was for a time after the Revolution called the "Stone Chapel", an 18th-century structure at the corner of Tremont Street and School Street in Boston, Massachusetts. The chapel building, completed in 1754, is one of the finest designs of the noted colonial architect Peter Harrison, and was designated a National Historic Landmark in 1960 for its architectural significance. The congregation has worshipped according to a Unitarian version of the Book of Common Prayer since 1785, currently in its ninth edition.: 213 Despite its name, the adjacent King's Chapel Burying Ground is not affiliated with the chapel or any other church; it pre-dates the present church by over a century.