This Shining Night Church of the Good Samaritan, Paoli, PA Saturday, May 8, 2010 at 7:30 p.m. The world premiere of Valerie Showers Crescenz's Mass of Peace, plus a centennial celebration of works by West Chester native Samuel Barber, including Agnus Dei, Reincarnations, and Sure on this Shining Night.   Also featured will be the first and second place winners of the Society's annual Excellence in Vocal Performance Competition.