St Mary's Old Church parish church in the Church of England located in Old Town on St Mary's, Isles of Scilly. It was built at Old Town, Isles of Scilly during the 12th century, perhaps around 1130. Re-building was carried out between 1660 and 1667 including the addition of the south aisle, and a west end gallery for soldiers from the Garrison. Further improvements were made in 1743 when the east end was rebuilt.
By the nineteenth century, it was derelict and under the orders of Augustus Smith, Lord Proprietor of the Islands, it was restored.
The churchyard of Old Town church serves as the principal cemetery for the island of St Mary's. Over the centuries countless members of the old Scilly families have been buried here, as have been the crews of numerous ships lost near the Isles. Among them are Sir John Narborough and his brother James, the sons of Rear Admiral Sir John Narborough, who both died in the sinking of HMS Association in 1707. Also buried here is Ann Cargill (1760–1784), an 18th-century opera diva and celebrated beauty of her time. She died when her ship sank off the Western Rocks and was first buried on Rosevear, before eventually being interred at Old Town Church.
The Broch of Clickimin is a large and well preserved, though somewhat restored broch near Lerwick. Originally built on an island in Clickimin Loch (now increased in size by silting and drainage), it was approached by a stone causeway. The water-level in the loch was reduced in 1874, leaving the broch high and dry. The broch is situated within a walled enclosure and, unusually for brochs, features a large 'blockhouse' between the opening in the enclosure and the broch itself. Another unusual feature is a stone slab featuring sculptured footprints, located in the causeway which approached the site. Situated across the loch is the Clickimin Leisure Centre.