Kalisz is a city in central Poland. Situated on the Prosna river in the southeastern part of the Greater Poland Voivodeship, the city forms a conurbation with the nearby towns of Ostrów Wielkopolski and Skalmierzyce.
The town is an important industrial and commercial centre of the area, with many notable factories located there. It is also the seat of the Calisia piano factory and one of traditional centres of folk art.
Sometimes Kalisz is called "the oldest town of Poland" because the mention by Ptolemy of a town called Calisia that was situated on the Amber Trail. Although it is still not certain whether the exact spot where the city centre is located nowadays was inhabitated in 2nd century, there are many artifacts of the Roman times in the area, pointing to the fact that it must have been one of the stops of the Roman caravans heading for the Baltic Sea.