IntestazionePerowsky, Leon Alexew... Usata in: Integrated Authority File (GND), Germany
Count Lev Alekseyevich Perovski (Лев Алексеевич Перовский), 1792-1856. Mineralogist; namesake of perovskite; Russian Minister of Internal Affairs under Czar Nicholas I. Lithography,Other transliterations of his surname include Perovsky, von Perovsky, Perovskiy, von Perovski, Perovskii, Perowski and Perowsky. [Friedrich Jentzen / unknown (found on http://www.multicolour.com/alexandrite/chapter2/) -- Public domain -- http://commons.wikimedia.org/wiki/File:Count Lev Alekseevich Perovski.jpg]