Hackness Martello Tower and Battery is a former British Army barracks and currently a museum located on the island of South Walls, in Orkney, Scotland.

The Martello tower, together with another on the north side at Crockness, was built in 1815 to protect British ships in the bay of Longhope against attack by American and French privateers, during the Napoleonic Wars, while they waited for a Royal Navy escort on their journey to Baltic ports.

The towers were upgraded, with the installation of new guns and other structures, in 1866 at a time of concern about the possibility of another French invasion.

• Tally Toor, Leith

Media related to Hackness Martello Tower And Battery at Wikimedia Commons

• Hackness Martello Tower and Battery - official site at Historic Scotland