The Philadelphia Orchestra is an American symphony orchestra, based in Philadelphia. One of the "Big Five" American orchestras, the orchestra is based at the Kimmel Center for the Performing Arts, where it performs its subscription concerts, numbering over 130 annually, at Verizon Hall.

An orchestra is a large instrumental ensemble typical of classical music, which combines instruments from different families. There are typically four main sections of instruments:String instruments, such as the violin, viola, cello, and double bassWoodwinds, such as the flute, oboe, clarinet, bassoon, and occasional saxophoneBrass instruments, such as the horn, trumpet, trombone, cornet, euphonium, and tubaPercussion instruments, such as the timpani, snare drum, bass drum, cymbals, triangle, tambourine, tam-tam and mallet percussion instruments