Claim: Ksawery Lubomirski lived from 1747 until 1819, and had many possessions around Kiev which was previously destroyed during the Mongol invasions.
Evidence: Franciszek Ksawery Lubomirski (1747–1819) was a Polish noble, Russian general. Son of Stanisław Lubomirski, he had many possessions around Kiev, which following the First Partition of Poland fell under the Russian Empire control. Completely destroyed during the Mongol invasions in 1240, the city lost most of its influence for the centuries to come.