Imperial Palaces of Petersburg
Includes Alexander, Pavlovsk, Yelagin, Gatchina, and Catherine.
www.alexanderpalace.org/petepalaces
Palaces of the Moscow Kremlin
Features Grand Kremlin and Terem Palaces, and Palace of Facets.
uts.cc.utexas.edu/~powellm/palaces.html
Petrovsky Palace
Used as a stopover palace by czars and czarinas when returning to Moscow after the transfer of the capital to St. Petersburg.
bridgetomoscow.com/time-gap-petrovsky-palace