The Lockenhaus Chamber Music Festival has included performances by the solo pianist who has held what country's citizenship since 1972?
Lockenhaus Chamber Music Festival:  While both older and younger talents perform, notable performers include Vladimir Ashkenazy, Nikolaus Harnoncourt, Heinz Holliger, Cho-Liang Lin, and András Schiff. Vladimir Ashkenazy: Vladimir Davidovich Ashkenazy (Russian: Влади́мир Дави́дович Ашкена́зи , "Vladimir Davidovich Ashkenazi"; born 6 July 1937) is an internationally recognized solo pianist, chamber music performer, and conductor. Vladimir Ashkenazy:  He is originally from Russia and has held Icelandic citizenship since 1972.
Icelandic