Parish Church of St Mary

The Parish Church of St Mary in Bluntisham is a Grade I listed building. It features an apsidal chancel and chapel from the 14th century, a west tower from the late 14th century, and a nave with aisles built in the mid-15th century, along with later porches and buttresses. The church has undergone restoration and repair in the 17th and 19th centuries. Its walls are made of stone and pebble rubble, with Ketton and Barnack stone and clunch dressings, while some brick is present in the upper stages of the tower. The roofs are covered with lead and old plain tiles.

The tower consists of three stages, topped with an embattled parapet and a stair turret at the northeast angle. It features an octagonal spire with alternating spire lights that have gabled heads. The aisles extend to the face of the tower, which has a wave-moulded plinth band interrupted by later porches and buttresses. The nave has a clerestory with four windows, each containing two cinquefoil lights in four-centred heads. The chancel has an apsidal end with tripartite, lead-covered, sloping gable roofs, featuring two trefoiled light windows on each face. The south and north porches bear the inscription "1656 GPITS and TCI."

Inside, there are three tower arches with wave-moulded orders of clunch. The chancel arch and the north and south arcades consist of four bays with two-centred arches, supported by moulded columns with four attached shafts, moulded capitals, and bases. The fine 15th-century nave roof has four bays, with wall posts resting on carved stone corbels. An early 16th-century oak door with a two-centred head leads to the ringing chamber, which also has a nail-studded oak plank door. The font, made of Barnack stone, features quatrefoil panels and is panelled and carved with 'green men' on the underside.