In 1648, the Cossack-Tatar army plundered and destroyed the city, killing almost the entire population, including all Jews. In 1657 the city was devastated again, this time by the Swedes during the Deluge. John III Sobieski and the subsequent Polish kings granted the right to four annual fairs. Horses and, above all, oxen from nearby Volhynia were sold at these fairs, with the latter being even sold to Kraków, Poznań, Berlin and Vienna. These fairs, as well as the staple right for salt contributed to Włodawa's wealth. In the 17th century, Rafał Leszczyński, father of the future Polish King Stanisław Leszczyński, became the owner of Włodawa, but due to debts he sold it to Ludwik Pociej. Pociej brought the Paulines from the Jasna Góra Monastery in Częstochowa to Włodawa and built their monastery. In the 18th century, the city was the property of the Pociej, Flemming, Czartoryski and Zamoyski families.