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With the idea of bringing opera to the masses for cheap, originally named Népopera (The People's Opera), the theatre was planned and built by the Népopera JSC (funded largely by the Budapest city council). The council provided the plot for free, but in return it regulated the theatre's operation: among other requirements, it had to employ a permanent Hungarian company, and the language of the plays had to be Hungarian. (Wikipedia)

Wikipedia Erkel_Theatre
Capacity 2427
Address Budapest, II. János Pál pápa tér 30, 1087 , Budapest, Hungary
Opening year 1911, December 7th
Official website https://www.opera.hu/