The Colby College Collegium will combine forces with guest artists in a rarely heard performance of the Passion setting by Reinhard Keiser, a contemporary of J.S. Bach. The work is a musical telling of the crucifixion of Jesus Christ according to the Gospel of St. Mark and was performed frequently by Bach himself as part of Good Friday services in Leipzig. The Collegium will be joined by members of the Nahant Music Festival chorus and a period-instrument orchestra. Shuttle service will be available from the Eustis parking lot beginning at 7pm and immediately after the performance.