The Chamber Choir of St. John’s Catholic Church, under the direction of Kevin Birch, will hold a series of concerts featuring rarely heard 20th century sacred music for organ and choir. The free concerts will feature organ and choral works by Dutch and French composers. The Bangor concert will be held at 7:30 p.m. Nov. 11 at St. John’s Catholic Church, 207 York St. in Bangor. In addition to Bangor, the choir will perform in Lewiston, Boston and New Bedford, Mass. For information, call 942-6941.