Beside the River Wensum on the north-eastern edge of medieval Norwich stands the Cow Tower, one of the most unusual defensive structures in England. Built in 1398 and 1399 by the city authorities, the circular tower was designed specifically to deploy gunpowder artillery – a purpose that was remarkably rare for the period. Only God’s House Tower in Southampton and the West Gate at Canterbury are considered close equivalents. The tower is now managed jointly by English Heritage and Norwich City Council and is freely accessible as part of a riverside walk.
Design and Construction
The tower rises 14.6 metres and measures 11.2 metres across, divided into three storeys with walls 1.8 metres thick at the base. Those walls are built around a core of flint stone, faced with brick on both the inner and outer surfaces. The archaeologist T. P. Smith has described this brickwork as among the finest medieval examples in England. Gunports in the walls accommodated hand cannons and smaller artillery pieces, while the roof platform was designed to carry heavier bombards, supported by wide embrasures to allow adequate firing angles. When garrisoned, the different floors likely served separate purposes – one for dining, one for sleeping – making Cow Tower a functional residence as well as a fortification.
Why Norwich Built It
Norwich in the late 14th century had a population of around 5,000 and was a prosperous centre for international trade. The city had already constructed a full circuit of defensive stone walls and ditches between 1297 and 1350. By the 1380s, fears of French coastal raids were growing across England, and Norwich drew particular comparisons with Southampton, a trading city that a French attack had devastated in 1338. The Peasant Revolt of 1381, during which rebels looted Norwich, added further urgency. The Cow Tower was placed away from the main city wall, close to the river, where its height gave it firing lines across the higher ground on the opposite bank – ground that an attacker could otherwise have used to overlook the city.
Later History and Condition
The tower was kept in service throughout the 15th century. In 1549 it suffered direct damage during Kett’s Rebellion, when rebel forces attacked Norwich with artillery and knocked away sections of the parapets. Repair work carried out in the late 19th century, though well-intentioned, caused long-term structural harm. By 1953 the tower had deteriorated enough to be taken into the guardianship of the Ministry of Works, which spent five years stabilising it. Today Cow Tower is a shell – the floors and roof are long gone – but the walls and gunports survive, and the tower remains a rare physical record of early gunpowder fortification in England.