The National Arts Centre Orchestra (NAC Orchestra) is a Canadian orchestra based in Ottawa, Ontario led by Music Director Alexander Shelley. The NAC Orchestra's primary concert venue is the eponymous National Arts Centre. Since its inception, the Orchestra has commissioned more than 90 works, mostly from Canadian composers. The NAC Orchestra is an award-winning recording orchestra, releasing two recordings per year. The Orchestra has visited more than 125 cities in Canada and more than 130 cities internationally in its 50-year history, including a coast-to-coast Canadian tour in 1999 and again in 2016. Most recently in May 2019, the NAC Orchestra completed a major European tour, performing and delivering education events five countries in 7 cities and .