The real Ipatiev House was demolished in 1977 on orders from the Politburo, which claimed the site lacked "historical significance" to prevent it from becoming a shrine.
The parallel between the "stamps" scene in the beginning and Philip’s hobby-shaming later on adds a layer of continuity many fans missed. [S5E6] Ipatiev House
How did the episode change your perspective on King George V’s legacy? The real Ipatiev House was demolished in 1977
Tsar Nicholas II, Empress Alexandra, and their five children were executed by Bolshevik revolutionaries on the night of July 16–17, 1918. [S5E6] Ipatiev House