The Chamber Orchestra of Philadelphia hosted a Black-tie, 75th Birthday Celebration on March 30th at the Rittenhouse Hotel to honor one of the towering musical figures of our time cellist, Mstislav "Slava" Rostropovich. After cocktails in the Cassatt Lounge guests sauntered upstairs for dinner and dancing in the ballroom. Chef Jean-Marie Lacroix prepared an authentic Russian feast, including caviar for all. Then, on April 2nd, Rostropovich, his fingers flying deftly over the cello strings, performed with the Chamber Orchestra at the Kimmel Center to a nearly full house. Ignat Solzhenitsyn, the Chamber Orchestra's principal conductor as well as an accomplished pianist in his own right, and Slava have had a very close friendship all of Solzhenitsyn's life, so the concert was ended with a special song that the two played, unaccompanied.