The clashes outside the Ivan Vazov National Theatre during the opening night of John Malkovich's production of Bernard Shaw's Arms and the Man have prompted 247 theatre organisations from 39 countries to appeal to the institutions of the European Union.

"At the National Theatre in Sofia, a more than 100-year-old play set in a fictional Bulgaria was performed without an audience on its premiere night because of attacks from ultra-nationalist circles who physically prevented the audience from entering the theatre building," the artists said in their letter to the European Parliament, stressing that attacks on artistic freedom have reached an almost absurd level in many member states.

The theatre organisations call on the European institutions to take note of the nationalist attacks against cultural institutions and the arts. 

They add that what is happening is part of an organised strategy to subordinate culture to conservative and nationalist politics, which could lead to the undermining of the Europeana 1989 project to promote Europe's cultural heritage.