The Home of the Last Tsar - Romanov and Russian History

Nick,was one of the stars of "Broadway Melody of 1936" - a TCM classic.  His co-stars were Robert Stack, Buddy Epsen and Eleanor Powell. Why did his career go down the tubes?

Here's a page dedicated to this famous mosaic in the apse sem-dome of the great cathedral church of old Byzantium.  It dates from the original redecoration of the church after iconoclasm ended.