Visitors walk past a model of Kremlin's Spasskaya Tower at the "Russia in Miniatures" exhibition in Moscow, Russia, on Sept. 25, 2019. More than 80 models of famous Russian landmarks are on display at the "Russia in Miniatures" exhibition in Moscow, which will run until October this year. (Photo: Maxim Chernavsky/Xinhua)

A model of St. Basil's Cathedral is seen at the "Russia in Miniatures" exhibition in Moscow, Russia, on Sept. 25, 2019. More than 80 models of famous Russian landmarks are on display at the "Russia in Miniatures" exhibition in Moscow, which will run until October this year. (Photo: Maxim Chernavsky/Xinhua)

A model of the Soldier and Sailor Monument is seen at the "Russia in Miniatures" exhibition in Moscow, Russia, on Sept. 25, 2019. More than 80 models of famous Russian landmarks are on display at the "Russia in Miniatures" exhibition in Moscow, which will run until October this year. (Photo: Maxim Chernavsky/Xinhua)

Visitors watch a model of Vyborg Castle at the "Russia in Miniatures" exhibition in Moscow, Russia, on Sept. 25, 2019. More than 80 models of famous Russian landmarks are on display at the "Russia in Miniatures" exhibition in Moscow, which will run until October this year. (Photo: Maxim Chernavsky/Xinhua)

A model of St. Isaac's Cathedral is seen at the "Russia in Miniatures" exhibition in Moscow, Russia, on Sept. 25, 2019. More than 80 models of famous Russian landmarks are on display at the "Russia in Miniatures" exhibition in Moscow, which will run until October this year. (Photo: Maxim Chernavsky/Xinhua)