Norwich Dragon Hall, The Guildhall and Strangers' Hall, the Art Nouveau of the 1899 Royal Arcade, many medieval lanes and the winding River Wensum that flows through the city centre towards Norwich Castle. The city has two universities, the University of East Anglia and the Norwich University of the Arts, and two cathedrals, Norwich Cathedral and St John the Baptist Cathedral. Norwich is the only city within a National Park, the Norfolk Broads, and it also holds the largest permanent undercover market in Europe. The urban area of Norwich had a population of 213,166 according to the 2011 Census. The parliamentary
Cow Tower, Norwich to maintain the urban defences; like other towers and gatehouses belonging to the city, however, by this period the Cow Tower was probably leased out to a merchant or craftsman when not in military use. In 1549, Robert Kett led an uprising in Norfolk; marching on Norwich, his army camped on the north-east side of the river, overlooking Cow Tower. Two rebel attacks were then made across the river into the Hospital meadows, in an attempt to take Bishop Bridge, which would have given them access to the city. Kett had brought artillery, which he turned on the Cow Tower,