sentences:  Repairs to the tower's walls in the late 19th century inadvertently caused long-term damage, and in 1953 it was taken into the guardianship of the Ministry of Works, who stabilised its condition in a five-year conservation project.In the 21st century, Cow Tower is managed by English Heritage and Norwich City Council; the tower is now only a shell, however, as the floors and the roof of the building have been lost.The circular tower is across, high and divided into three storeys.