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Saint John Cantius Church (Polish: Kościół Świętego Jana Kantego) is a historic Latin Catholic church of the Archdiocese of Chicago known for its architecture, liturgical practices, and affiliation with the Canons Regular of St. John Cantius.With monumental religious edifices of St. Mary of the Angels, St. Hedwig's or St. Wenceslaus, it is one of the many Polish churches that overlook the Kennedy Expressway.
The unique baroque interior has remained intact for more than a century and is reminiscent of the sumptuous art and architecture of 18th century Kraków. Of all the Polish Cathedral style churches in Chicago, St. John Cantius stands closest to downtown. In 2013, the parish completed a significant restoration. The 130 feet (40 m) tower is readily seen from the nearby Kennedy Expressway and is a landmark in Chicago's West Town neighborhood, located at 825 North Carpenter Street.