Mosaic of Leo VI from the Narthex of Hagia Sophia

This mosaic stands above the main Imperial door from the inner narthex into the sanctuary of Hagia Sophia.  Leo was married too many times and this mosaic was a result of his problems with the Church.

Schaffer Collection of Russian Art Treasures

Here's a great article with an actual catalog from the Schaffers - before ALVR was opened - offering Faberge and Imperial treasures for sale in New York