sentences:  Also as part of the events of World Youth Day, Cologne Cathedral hosted a televised gala performance of Beethoven's Missa Solemnis, performed by the Royal Philharmonic Orchestra and the London Philharmonic Choir conducted by Sir Gilbert Levine.On 25 August 2007, the cathedral received a new stained glass window in the south transept.The glass work was created by the German artist Gerhard Richter with the €400,000 cost paid by donations.