The College Choir of Martin Luther College, New Ulm, Minn., and the Seminary Chorus of Wisconsin Lutheran Seminary, Mequon, Wis., are presenting joint concerts in March as part of the synod’s 175th anniversary. The concert will be offered at two locations: St. John’s Hillside in Milwaukee at 7 p.m., March 20, and Martin Luther College at 7 p.m., March 29.