Obolenskoye, Zhukovsky District, Kaluga Oblast

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Obolensk is also the name of a modern settlement (established 1975 as a base for the Soviet Biopreparat biological weapons program, and named for the historical city) in Serpukhovsky District, Moscow Oblast.

54°53′41″N 36°55′20″E / 54.89472°N 36.92222°E / 54.89472; 36.92222 Obolensk (Russian: Оболенск) was a city in Russia, and in the medieval period one of the Upper Oka Principalities, situated at the Protva River (some 80 km south-to-southwest of Moscow, or some 20 km downstream (east) of Obninsk).