The non-profit entrepreneurial company European Opera Rarities (EOR) based in Berlin-Charlottenburg was founded by the opera director Axel Kresin and the conductor Martin Fischer-Dieskau in October 2010. Anton Zapf has been chief conductor since May 2021.

The enterprise aims to revive and explore opera works from the treasure trove of European musical history especially those that have been unjustly forgotten. Europe's political history, its utopias and rejections, have always been the subject of of these jewels of the music theatre. They will be performed in locations that clearly Europe's destiny.

In 1813, Teplice was the headquarters in which the monarchies of Austria, Prussia and Russia formed their alliance against Napoleon Bonaparte. During the subsequent half-century, Teplice repeatedly established itself as an amicable gathering place for the political interchange of the European monarchs.

Poznán, the historical capital of Poland, passed to Prussia in the aftermath of the second Polish partition. After initially being part of the pro-Napoleon Duchy of Warsaw, Poznán became Prussian again after the Vienna Congress. It was onnly after the grand Polish uprising Poznán again became part of the restored Polish State within the framework of the Treaty of Versailles. It was once again occupied by the Germans during the Second World War.

Rovereto is part of Trentino, which was subordinated to the Duchy of Bavaria during the Middle Ages. In addition to Chiavenna and temporarily Aquileia, Trentino was the only part of Italy which was integrated formally into the Holy Roman Empire. After the foundation of an independent territorial state, the House of Habsburg-Lorraine conquered the 'Welsh Confines' in 1518, i.e. Rovereto amongst other places, before the Trentino became annexed to South Tyrol following the Vienna Congress. It was only at the end of the First World War that Rovereto became part of the Kingdom of Italy.

European Opera Rarities wishes to further deepen understanding between the six European countries Germany, Austria, Italy, Poland, Slovakia and the Czech Rebublic. In addition to renowned singing personalities, EOR intends to provide a platform for young international vocal talent in the heart of Europe.