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In its two-story height and Greek cross plan, St. Paul's is comparable to Aquia Church in nearby Stafford County. Nonetheless, the exterior, remarkably austere despite its fine Flemish bond brickwork, has led historians to note the building's greater similarity to English Dissenter chapels than to more ornamented and richer Church of England structures. Abandoned during disestablishment, the structure was converted into a school in 1813. The entrances were altered by closing the north and west doorways and adding two doors on the south elevation. About 1830 restoration began. The interior woodwork largely dates from this period.