The Guangzhou Museum is located in Yuexiu Park within the 14th century Tower Controlling the Sea (zhenhai lou). Each of the 5 stories of the 28 meter (92ft) tower has exhibitions relating to the history of Guangzhou from prehistoric times to the present. The 3rd and 4th floors have some interesting exhibits relating to Guangzhou’s role as a trading center both before and after the Opium Wars (1839-1862). The top floor of the tower has a café and a selection of shops selling traditional gifts and souvenirs.