Ryazan Governorate
Tambov Governorate was an administrative unit of the Russian Empire, Russian Republic, and later the Russian SFSR, centred around the city of Tambov. The governorate was located between 51°14' and 55°6' north and between 38°9' and 43°38' east. It bordered Vladimir Governorate and Nizhny Novgorod Governorate to north, Penza Governorate and Saratov Governorate to the east, Voronezh Governorate to south and west, and Oryol Governorate, Tula Governorate, and Ryazan Governorate to the west.