St. Hyacinth Basilica, formally the Basilica of St. Hyacinth, - historic church of the Roman Catholic Archdiocese of Chicago, located at 3636 West Wolfram Street in the Avondale neighborhood of Chicago, Illinois. It is a prime example of the so-called "Polish Cathedral style" of churches in both its opulence and grand scale. Along with such monumental religious edifices as St. Mary of the Angels, St. Hedwig's, and St. Wenceslaus, it is one of the many monumental Polish churches visible from the Kennedy Expressway.