Union Chapel
Also known as: Oak Bluffs Christian Union Chapel
Why it's listed
Union Chapel is an eight-sided, wood-frame meetinghouse in the Ocean Park neighborhood of Oak Bluffs, on the north side of Martha's Vineyard. Built in 1870-1871 and designed by Boston architect Samuel Freeman Pratt, it combines Stick Style construction with Gothic Revival detailing and Queen Anne cedar shingles. Its two-tiered octagonal roof, clerestory, four entrance porches and star-patterned rafters inside give it a distinctive profile and fine acoustics. A 1928 ell was added, and the bell tower and steeple were removed that year. The chapel mattered because it was the first nonsectarian religious building on the Vineyard, serving islanders and summer visitors of any denomination in a resort next to a Methodist camp meeting. It is also the only surviving major work of Pratt, whose Sea View Hotel burned in 1892, and the only historic octagonal building on the island. It has remained in religious use since it was built.
Significance in brief: It was the first nonsectarian religious building on the Vineyard, in a community previously known for Methodist camp meetings. It is the single surviving major work of local architect Samuel Freeman Pratt and the only extant historic eight-sided building on the island. The nomination argues it meets Criteria A and C at the local level.
Machine-generated summary. This summary was generated by a language model from the official nomination document and has not been reviewed line by line by an editor. It may contain errors. Check the source document before relying on any detail. Source: nomination document (PDF) · National Archives catalog entry. NRHP reference 90000677, listed June 7, 1990. Summary generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29, confidence high).
Key facts
| Address | Bounded by Circuit, Kennebec, and Narragansett Aves. and Grove St., Oak Bluffs |
|---|---|
| County | Dukes County |
| Listed | June 7, 1990 |
| Reference number | 90000677 |
| Resource type | Building |
| Period of significance | 1870-1940 |
| Architect / builder | Pratt, Samuel Freeman |
| Architectural style | Late Victorian: Octagonal Mode; Stick Style |
| Criteria |
|
| Areas of significance | Architecture, Religion |
| Level of significance | Local |
| Status (as stated in the nomination) | In continued use as an interdenominational house of worship since construction; the original bell tower and steeple were removed in 1928. |
| Acreage | 0.9 |
| Coordinates | 41.45468, -70.55817 (NPS GIS) |
What listing means for this property
Religious properties are listed for their architectural or historical significance, not their religious use. Listing is honorary and does not restrict the congregation's use of the building. The federal rehabilitation credit is generally unavailable unless part of the building is income-producing; some state programmes and preservation grants do cover religious buildings. Federal funding or permits trigger Section 106 review.
General information, not legal or tax advice. Rules change; confirm with your State Historic Preservation Office or a qualified adviser.
Sources and further reading
- National Park Service, National Register of Historic Places database (snapshot May 2026), reference 90000677.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q7885486
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.