Here's a page I wrote that is dedicated to the very hard to find mosaic in the upper gallery of Hagia Sophia of the Byzantine Emperor Alexander - Alexandros
Seraphim Mosaic in Hagia Sophia
This page from the Hagia Sophia website is about the famous 15th century image of angel on the left side of the apse whose face was recently uncovered
Imperial Bedroom
Portrait Hall
Mauve Room
Maple Room
Aleksey's Bedroom
Nicholas's Study
Aleksey's Playroom
Formal Reception
Balcony View
Aleksey- Balcony
Children-Mauve
Nicholas's Bathroom
Alexandra- Mauve
Nicholas's Reception
Tsarskoe Selo Map