Martin is a village in the parish of Roughton in the East Lindsey district of the county, 2 miles SW of Horncastle. It stands in a farmyard and is a squared greenstone rubble building of nave and chancel only. Romanesque sculpture is found on the S nave doorway, the chancel arch responds, and a waterleaf capital reset in the east wall of the chancel.

In 1086 the Bishop of Durham held 12 bovates in Martin, as sokeland of Kirkby on Bain. A second holding of 1½ carucates was held by Eudo FitzSpirewic, also as sokeland of Kirkby.

The doorway is heavily restored, but the suviving parts, especially the elaborate lozenge ornament, suggest a date well into the 2nd half of the 12thc, perhaps c.1160-70. The chancel arch may be of a similar date, as may the lone flat-leaf capital.