Violinist Anne-Sophie Mutter, the singers Okka von der Damerau, Wolfgang Ablinger-Sperrhacke, Kevin Conners, Christian Gerhaher and the conductors Hansjörg Albrecht and Thomas Hengelbrock, on behalf of and with the support of the initiative ‘Aufstehen für die Kunst’ (Standing up for Arts), have filed an urgent constitutional complaint in summary proceedings with the Federal Constitutional Court against the closure of theatres, opera houses and concert halls, with an infection incidence above 100, in Germany, as provided for in the Notbremsegesetz (Emergency Brake Law). An urgent appeal to the Bavarian Administrative Court was dismissed on 15 April.