St Mary the Virgin's Church, Great Ouseburn

The lower part of the tower dates from the Norman era, the upper part was added in the 13th century, the arcades date from the 14th century, and the chancel from the following century. The vestry and aisles were rebuilt in 1820. In 1994 a porch was built. Since then a toilet and kitchenette have been added, and the organ has been moved; moving the organ allowed the chapel to be restored.

The tower arch is round-headed. The arcades consist of tall, pointed arches carried on slender round columns. On the north wall of the chancel are two monuments by Fisher of York dated 1779 and 1780. The two-manual organ was installed in the church by Peter Wood and Son. It had originally been built in 1962 by J. W. Walker and Sons for the First Church of Christ, Scientist, Haywards Heath, and was moved to St Mary's in 2000. This replaced a much smaller, single-manual organ, which was built in 1888 by Forster and Andrews, and moved to Japan following the installation of the present organ.