some of the greatest orchestras today include: the new york philharmonic orchestra, the boston symphony orchestra, the chicago symphony orchestra, the cleveland orchestra, the los angeles philharmonic orchestra, the london symphony orchestra, the london philharmonic orchestra, the bbc symphony orchestra, the royal concertgebouw orchestra, the vienna philharmonic orchestra, the berlin philharmonic orchestra, the leipzig gewandhaus orchestra, the , the st petersburg philharmonic orchestra, the israel philharmonic orchestra, and the nhk symphony orchestra (tokyo). opera houses usually have their own orchestra, e.g. the orchestras of the metropolitan opera house, la scala, or the royal opera house.