 Twenty-five years later, Tiffany's overall design scheme was completed with the Chapel of the Angels reredos mosaic depicting the Witnesses of the Redemption.From the 1890s through the 1920s, parishioners donated stained glass windows of eclectic styles.In 1997 St. Michael's Church became a "Designated Historical Building" on the National Register of Historic Places and the New York State Register of Historic Places.