Wesleyan Grove is a 34-acre (14 ha) National Historic Landmark District in Oak Bluffs, Massachusetts on the island of Martha's Vineyard.

[3] Just after the American Civil War, the area developed as a large Methodist summer campground with open air Christian revivals.

They continued to be religious in nature, but the participants also began to enjoy the benefit of the sea air and social interaction as they revived both mind and body.

One source provides this description of the original buildings:[3][They were] between 11 and 16 feet in width, with wide, double-door entrances and tall roofs with steep gables pitched at 90 degrees.

A National Geographic report in 2019 described the Illumination as follows:[8]During this spectacle, now celebrating its sesquicentennial, residents and guests gather in the Oak Bluffs Tabernacle for a twilight sing-along, followed by the ceremonial candle lighting of one of the lanterns.

The residents then light their own lanterns until the whole village is illuminated by the colorful paper and silk designs.Many eminent members of the clergy from across the country have preached at the campmeetings in Wesleyan Grove.

Over time, the Martha's Vineyard Camp Meeting Association has become increasingly interdenominational, and the current members of the Board of Directors are affiliated with a wide variety of religious groups.

Architecturally, the Tabernacle is a unique structure, with wrought iron arches and supports, two clerestories with dozens of colored glass windows, and an octagonal cupola.

It was large enough to seat 30, and it included lattice screen supports, movable rear shutters for ventilation, and a roof that was angled to amplify the voice of the speaker.

Much of the work was completed by 2019, including stabilization of the columns, removal of lead paint and repainting, the addition of new lights that were historically accurate, restoration of the cupola and replacement of the cross and the rebuilding of the upper clerestory.