Saint John Cantius Church (Polish: Kościół Świętego Jana Kantego) is a historic 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.