It’s the Boris Christoff centenary.
Born in Plovdiv, Bulgaria, on 18 May 1914, Christoff made his operatic debut on 12 May 1946 as Colline in La Bohème at Reggio Calabria. After the Communist takeover, he never sang again in his homeland.
Boris Chistoff was the outstanding Boris Godunov after Chaliapin.
Official biography here.