Hungary's entertainment culture has a classical music foundation of international significance — Budapest's State Opera House, designed by Miklós Ybl in 1884, is considered one of Europe's most beautiful, and its production standard reflects the country's position within the Central European opera tradition. The Sziget Festival, held on an island in the Danube in August, is one of Europe's largest and most respected multi-genre music festivals, drawing headline acts across five days of camping and stages. The ruin bar culture of Budapest's seventh district — Szimpla Kert is the original, spawning dozens of successors in abandoned courtyards and factory spaces — created an entertainment format that has influenced bar culture across Europe. The Hungarian folk dance and folk music revival circuit, with its táncház dance house events, adds a living traditional register.