Tula (Russian: Ту́ла; IPA: [ˈtulə]) is an industrial city and the administrative center of Tula Oblast, Russia, located 193 kilometers (120 mi) south of Moscow, on the Upa River. Population: 501,129 (2010 Census preliminary results); 481,216 (2002 Census); 539,980 (1989 Census).

Tula was first mentioned in the Nikon Chronicle in relation to a military operation conducted in 1146.^{[citation needed]} However, since the chronicle was written in the 16th century, the date is disputed. The first confirmed mention of Tula dates back to 1382.^{[citation needed]}

The name of the city is of pre-Russian, probably Baltic, origin. In the Middle Ages, Tula was a minor fortress at the border of the Principality of Ryazan. As soon as it passed to the Grand Duchy of Moscow, a brick citadel, or kremlin, was constructed in 1530. It was a key fortress of the Great Abatis Belt and successfully resisted a siege by the Tatars in 1552. In 1607, Ivan Bolotnikov and his supporters seized the citadel and withstood a four-months siege by the Tsar's army. In the 18th century, some parts of the kremlin walls were demolished. Despite its archaic appearance, the five-domed Assumption Cathedral in the kremlin was built as late as 1764.

Russia ⁱ/ˈrʌʃə/ or /ˈrʊʃə/ (Russian: Россия, tr. Rossiya; IPA: [rɐˈsʲijə] ( listen)), also officially known as the Russian Federation (Russian: Российская Федерация, tr. Rossiyskaya Federatsiya; IPA: [rɐˈsʲijskəjə fʲɪdʲɪˈratsɨjə] ( listen)), is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects. From northwest to southeast, Russia shares borders with Norway, Finland, Estonia, Latvia, Lithuania and Poland (both via Kaliningrad Oblast), Belarus, Ukraine, Georgia, Azerbaijan, Kazakhstan, China, Mongolia, and North Korea. It also has maritime borders with Japan by the Sea of Okhotsk, and the US state of Alaska by the Bering Strait. At 17,075,400 square kilometres (6,592,800 sq mi), Russia is the largest country in the world, covering more than one eighth of the Earth's inhabited land area. Russia is also the eighth most populous nation with 143 million people. It extends across the whole of northern Asia and 40% of Europe, spanning nine time zones and incorporating a wide range of environments and landforms. Russia has the world's largest reserves of mineral and energy resources and is the largest producer of oil and natural gas globally. Russia has the world's largest forest reserves and its lakes contain approximately one-quarter of the world's fresh water.