Wawel Hill is at the southern tip of Krakow. By 962 Krakow had become a trade center as reported by a traveling merchant from Cordova, Ibrahim ibn Yagub. It was made a bishopric in 1000 and the capital of Poland some forty years later. The town center was designed in 1257, after devastation by the invading Tatars, and has remained mostly unchanged since. Its Market Square (the Rynek) is one of the largest medieval squares in Europe.