July 14th, 2017, O+A performed their "Requiem" in the Rotunda of Galerius, in Thessaloniki, Greece as part of the documenta 14 festival with Soprano Sarah Chalfy, Mezzo-soprano Hai-Ting Chinn, Tenor Christopher Sokolowski, and Bass Mark Uhleman. The Requiem (for fossil fuels, aka for the Extraction Economy) features an orchestra of city resonances played live over an 8 channel surround system, and the full Requiem text sung by four virtuosic singers in the 4th century Rotunda, with its high dome and Ancient Roman acoustics. Mix and mastering by Mark Fuller Curators: Elena Sorokina and Bonaventure Soh Bejeng Ndikung Organised by: documenta 14 | Municipality of Thessaloniki – Department of Culture and Tourism | State Museum of Contemporary Art | Artecitya by Goethe-Institut Thessaloniki | Artecitya by Helexpo | ArtBOX Creative Arts Management Supported by: General Directorate of Antiquities & Cultural Heritage – Ephorate of Antiquities, Thessaloniki | Bundeskanzleramt Österreich | Kulturland Oberösterreich | Mid Atlantic Arts Foundation (MAAF) | Creative Europe program of the European Commission