b'The Virtuoso Violist Anna Marie Ahn Petersen (viola) & Jeffrey Uhlig (piano) October 9, 7:30 p.m.The Washington Post recently wrote, She plays with a grace and fluency that mark her as a major artist. Dont miss this veteran member ofThe Philadelphia Orchestra performing century-spanning sonatas and more.Anna Marie Ahn PetersenAnna Marie joined the Philadelphia Orchestra as a violist immediately upon graduation from the Curtis Institute of Music. Since, she has collaborated with such luminaries as Wolfgang Sawallisch and Christopher Parkening, and has performed at the Ravinia and Kingston Chamber Music Festivals, and as a soloist with the Seoul Philharmonic and the Orquesta Filarmonica de Bogota among others.62'