The tower was constructed between 1398 and 1399 to defend the city against potential attacks from the river.
Its D-shaped design was specifically engineered to deflect projectiles while allowing defensive cannons to sweep the river approach.
It is among the oldest surviving examples of specialized artillery fortification in England.
The tower was built on the site of a former medieval cattle pasture, which is the likely source of its name.
The walls are approximately 2.5 meters thick, reflecting the need to withstand early cannon fire.
Cow Tower is a mid-14th-century artillery blockhouse situated on the banks of the River Wensum in Norwich. It served as a vital part of the city's medieval defensive walls, specifically designed to protect a vulnerable river crossing. The structure is one of the earliest examples of a purpose-built artillery tower in England. Its design features a D-shaped plan, with the flat side facing the river to minimize structural damage from potential siege weaponry. Constructed from flint and brick, the tower originally stood three stories high. It functioned as a strategic firing platform for gunpowder artillery, marking a significant transition in military architecture. Today, the exterior is managed by English Heritage as a free-to-access historical landmark.
The path on the opposite (west) side of the river provides a clear, unobstructed view of the tower's iconic D-shape against the water.
View the tower from the opposite bank of the River Wensum for the best perspective of its D-shaped structure.
The site is outdoors and lacks shelter, so check weather forecasts before visiting.
Combine your visit with a walk through the nearby meadows along the river path.
Attempting to climb the exterior walls or enter the ruins, as internal access is restricted for preservation.
The site is an outdoor ruin and is accessible year-round during daylight hours, though the interior is permanently closed to the public.
