Saint Denys'

St Denys' Church is a medieval Anglican parish church in Sleaford, Lincolnshire, England. While a church and a priest have probably been present in the settlement since approximately 1086, the oldest parts of the present building are the tower and spire, which date to the late 12th and early 13th centuries; the stone broach spire is one of the earliest examples of its kind in England. The Decorated Gothic nave, aisles and north transept were built in the 14th century. The church was altered in the 19th century: the north aisle was rebuilt by the local builders Kirk and Parry in 1853 and the tower and spire were largely rebuilt in 1884 after being struck by lightning. St Denys' remains an active parish church.

The church is a Grade I listed building, a national designation given to "buildings of exceptional interest".