Principality of Chernigov
While the Mongols generally did not directly administer the Eastern European lands they conquered, in the cases of the Principality of Pereyaslavl, Principality of Kiev, and Podolia, they removed the native administration altogether and replaced it with their own direct control. The Kingdom of Galicia–Volhynia, Principality of Smolensk, Principality of Chernigov, and Principality of Novgorod-Seversk retained their princes but also had to contend with Mongol agents who enforced recruitment and tax collection. The Novgorod Republic was exempt from the presence of Mongol agents after 1260 but still had to pay taxes. The Mongols took censuses of Rus' lands in 1245, 1258, 1259, 1260, 1274, and 1275. No further censuses were taken after that. Some places such as the town of Tula became the personal property of individual Mongols such as the Khatun Taidula, the mother of Jani Beg.