Church of St Mary

The Church of St Mary is a parish church built between 1847 and 1848 on the site of a medieval church in Eaton Constantine. It is constructed from roughly coursed limestone and conglomerate rubble with ashlar dressings, featuring machine tile roofs adorned with fishscale bands, coped verges, and moulded eaves cornices. The church consists of a nave, chancel, west bellcote, south porch, and north vestry.

The nave is buttressed in four bays and has broad lancets with hoodmoulds. There is a gabled stone porch in the first bay from the west on the south side, and two lancets on the west wall linked by a single hoodmould with a quatrefoil window above. The gabled stone bellcote houses a single bell. The chancel is arranged in two bays, featuring lancets with hoodmoulds on the south side and an east window with three stepped lancets under a continuous hoodmould, along with a gabled vestry to the north.

Inside, the nave has an arch-braced King-post roof in four bays, while the chancel has a roof in two bays. There is a west gallery supported by two cast-iron columns and a pointed chancel arch with corbelled responds. The church contains a complete set of mid-19th century box pews, each with small brass name plates engraved in cursive lettering, along with contemporary fittings including a pulpit, reading desk, and chancel fittings, which include floor tiles. A mid-12th century font from the medieval church remains, featuring a circular design with a moulded pedestal and an ornamental band at the bottom of the basin. Stained glass can be found in the east window, dating to around 1888, and in the chancel south windows from about 1905. Additionally, two chairs in the sanctuary incorporate decorative carved panels from the late 15th or early 16th century, and one of the chancel benches is inscribed with "THOMAS BATHOE CHURCHWARDEN 1634."

Eaton Constantine was originally a dependent chapelry of Leighton but became a separate parish in the later Middle Ages. The old church was demolished in 1847, and the new one was built at a cost of £775.