DESCRIPTION: Valery Gergiev held an autograph session for the first time at the Concert Hall on 22 February. On 22 February, following a performance of the opera Das Rheingold at the Concert Hall of the Mariinsky Theatre, Valery Gergiev held an autograph session. The public had a unique opportunity to get the maestro's autograph on the Mariinsky label's most recent release -- a recording of Richard Wagner's Die Walkure