If the end result of a war is an exchange of territory, the outcome of a revolution is ultimately the exchange of real estate. The house at 716 Gerrard Street East is an apt illustration of the downward mobility of the politically displaced. Listed last week on MLS, the modest two-story Riverdale semidetached was the final residence of the Tsar Nicholas II’s last surviving sibling, Grand Duchess Olga Alexandranova. The highest ranking member of the Russian imperial family to emigrate to North America, Olga convalesced in the care of Russian friends who ran the beauty shop on the main floor....