St. John Cantius is a Roman Catholic church in the Archdiocese of Chicago. St. John’s offers daily the liturgy of the Roman rite in both the Ordinary and Extraordinary Forms. Its solemn liturgies and devotions, treasures of sacred art, and rich program of sacred liturgical music have helped many Catholics discover a profound sense of the Sacred. The historic baroque church is one of the best examples of sacred architecture in the city. One mile directly west of the famous Water tower on Chicago Avenue, St. John’s is easily accessible by car, bus, or subway.