The forts of Malta, an island fortress from the Knights to the Second World War

Heritage Malta puts it in a line I love, few islands in the world can claim the title of island fortress. Malta can, because its position in the middle of the Mediterranean and the Grand Harbour filled it with forts, bastions, towers, batteries and bunkers over nearly four centuries. Here are the ones I’d visit, why, and in what order.

Why Malta became a fortress

The entry Malta submitted to UNESCO for its harbour fortifications explains it well. The Grand Harbour was a perfect anchorage for battle fleets, and whoever held the island had to protect it. So Spanish, Italian, French and British engineers all worked here, and the result, the entry says, is one of the finest collections of military architecture in the world, with some 25 km of fortifications around the harbours alone. It traces the whole evolution, from the 16th-century bastioned front through Dutch-style crownworks and the French systems of Vauban to iron-fronted defences and the concrete emplacements of the Second World War. To me, that makes Malta a textbook of gunpowder fortification you can walk through.

Heritage Malta dates the big investment from 1530, when the Knights made Malta a Christian frontline, and from 1800, when it became Britain’s naval base. For a British visitor that second half is part of your own story.

The Knights’ forts around the Grand Harbour

It all began in Birgu. In 1530 the Order renamed the harbour castle, already recorded in 1274, as Fort St Angelo and built the islands’ first bastioned fortification there. It now has an interpretation centre with dioramas, and its upper part opens by arrangement with the Sovereign Order of Malta. In 1552 the Order added St Elmo on the opposite point, the fort that held for a month in the Great Siege of 1565.

After the siege the Order built Valletta on the Sciberras peninsula, and UNESCO’s entry calls it the keep of the whole system. Around it grew Fort Ricasoli and Fort Tigné, the Carafa bastions and three great lines, the Floriana, Santa Margherita and Cottonera Lines. My favourite starting point is Fort St Elmo, because there you grasp 1565 and 1940 at the same time.

The British and the giant guns

When Britain inherited the complex in 1800, it adapted it for a new threat, the ironclad. UNESCO notes that by the late 19th century much of the old bastioned circuit had become heavy-gun fortifications, with armoured emplacements and even Brennan torpedo installations.

Two forts show this brilliantly. Fort Rinella in Kalkara keeps its 100-ton gun, and Fort Delimara near Marsaxlokk has the world’s last 38-ton RML guns on their original carriages. Delimara stayed in service until coastal defence was abolished across the British Empire in 1956 and passed to the Maltese government at independence in 1964. Heritage Malta warns that the nearest bus stop is a 30-minute walk away. Inland, the British sealed off the north with the Victoria Lines, a chain of forts and walls along the Great Fault.

Watchtowers all round the coast

The other side of the defences were the towers, which watched the coast and raised the alarm about landings. VisitMalta dates Wignacourt Tower at St Paul’s Bay to 1610; it was the island’s northernmost defensive outpost until the Mellieħa tower went up, and today it holds a small museum of military architecture. Then came St Mary’s Tower on Comino in 1618 and the Red Tower at Mellieħa in 1647, which takes its name from the red it was painted during restoration.

On Gozo, the Ministry for Gozo dates Xlendi Tower to 1650, Dwejra Tower to 1652 and Mġarr ix-Xini Tower to 1661. Several open only on certain days, so before going I’d check whether the flag is flying, which is usually the signal.

Mdina and the Citadel, walled towns

Not everything is a coastal fort. Mdina and the Citadel in Gozo are walled towns on hilltops, both on UNESCO’s Tentative List since 1998. The Citadel’s entry recalls that in 1551 a raid carried off Gozo’s entire population into slavery, after which the enclosure became a purely military outpost.

A practical warning. Valletta’s Fortress Builders Interpretation Centre, which explains the fortifications with large models, has been closed since 15 September 2026 until further notice, according to Heritage Malta. If it reopens, it would be my first stop.