From the Wikipedia page 
Śrem County (Polish: powiat śremski) is a unit of territorial administration and local government (powiat) in Greater Poland Voivodeship, west-central Poland. It came into being on January 1, 1999, as a result of the Polish local government reforms passed in 1998. Its administrative seat and largest town is Śrem, which lies 36 kilometres (22 mi) south of the regional capital Poznań. The county also contains the towns of Książ Wielkopolski, lying 15 km (9 mi) east of Śrem, and Dolsk, 12 km (7 mi) south of Śrem.