 Built in 1910, this Beaux-Arts mansion served variously as the Russian or Soviet embassy during periods of established relations between 1913 and 1994.The embassy of the Russian Federation is situated on "Mount Alto" on Wisconsin Avenue Northwest, built on property leased to the Soviet government for 85 years on the basis of an agreement between the Soviet Union and the United States, concluded in 1969.Under the 1972 agreement, equivalent territory in Moscow was to be leased to the United States for a new embassy on the same conditions.