Ascension Day Organ Concert at Hallgrímskirkja Björn Steinar Sólbergsson organist at Hallgrímskirkja performs L'Ascension by Olivier Messiaen Thursday May 14th at 11hrs. Björn Steinar Sólbergsson, organist at Hallgrímskirkja, performs L'Ascension by Olivier Messiaen – a sublime, spiritual masterpiece in four movements depicting the Ascension of Christ. The concert takes place on Ascension Day, a sacred occasion that Messiaen’s music reflects with profound intensity and reverence. Priest: Rev. Irma Sjöfn Óskarsdóttir Free entry – all are welcome