Henryk IV Probus
With the influx of settlers the town expanded and in 1242 came under German town law. The city council used both Latin and German, and the early forms of the name "Breslau", the German name of the city, appeared for the first time in its written records. Polish gradually ceased to be used in the town books, while it survived in the courts until 1337. The enlarged town covered around , and the new main market square, surrounded by timber-frame houses, became the trade centre of the town. The original foundation, Ostrów Tumski, became its religious centre. The city gained Magdeburg rights in 1261. While the Polish Piast dynasty remained in control of the region, the ability of the city council to govern itself independently increased. In 1274 prince Henryk IV Probus gave the city its staple right. In the 13th century, two Polish monarchs were buried in Wrocław churches founded by them, Henry II the Pious in the St. Vincent church and Henryk IV Probus in the Holy Cross church.