Kalisz is a city in central Poland and the second-largest city in the Greater Poland Voivodeship with 100,246 inhabitants. It is the capital city of the Kalisz Region. Situated on the Prosna river in the southeastern part of Greater Poland, the city forms a conurbation with the nearby towns of Ostrów Wielkopolski and Nowe Skalmierzyce.
Kalisz is an important regional industrial and commercial centre with many notable factories. The city is also a centre for traditional folk art. The town was also the site of the former 'Calisia' piano factory, until it went out of business in 2007. The building was transformed into the Calisia One Hotel which opened in 2019.