The Slovenian Philharmonics is the central music institution in Ljubljana and Slovenia. It holds classical music concerts of domestic and foreign performers as well as educates youth. It was established in 1701 as part of Academia operosorum Labacensis and is among the oldest such institutions in Europe. The Slovene National Opera and Ballet Theatre also resides in Ljubljana, presenting a wide variety of domestic and foreign, modern and classic, opera, ballet and concert works. It serves as the national opera and ballet house. Music festivals are held in Ljubljana, chiefly in European classical music and jazz, for instance the Ljubljana Summer Festival (), and Trnfest.