Later Coombe Keynes' population declined until it is now only a hamlet. The lost part of the settlement was immediately east of the parish church. The area is now a field what appear to be platforms where cottages stood and a hollow way that would have been a lane. This depopulated area is now a Scheduled Ancient Monument.[3]
The Church of England parish church of the Holy Rood was formerly the centre of a large parish that included the village of Wool. In 1844 Wool was made into a separate parish. The two ecclesiastical parishes were recombined in 1967.[4]
The chancel arch and west tower of Holy Rood church is 13th-century. The rest of the church was rebuilt in 1860–61 to designs by Thomas Hicks. It is a Gothic Revival building with nave, chancel and north porch.[5] It was deconsecrated in 1974 and is now used as a secular function room managed by the Coombe Keynes Trust.[6]
The Coombe Keynes Chalice, a rare pre-Reformationchalice with an octagonal foot with embellished angles on the stem, is now kept in the Dorset Museum.[7]