Kalisz Cathedral, officially known as the Cathedral of St. Nicholas, is a prominent Roman Catholic church located in Kalisz, Poland. It serves as the seat of the Diocese of Kalisz and is known for its stunning architecture, which combines elements of Gothic and Baroque styles. The cathedral was originally built in the 13th century and has undergone several renovations over the years. The interior of Kalisz Cathedral features beautiful altars, intricate stained glass windows, and notable artwork. One of its significant relics is the statue of the Virgin Mary, which attracts many pilgrims. The cathedral is not only a place of worship but also a key historical landmark in the region.