Until 2020 only three Carolingian coins had been discovered in Poland, in the Truso emporium. The situation changed in 2020 and 2021 when members of the "Gryf" Association discovered some XRISTIANA RELIGIO coins in Biskupiec (Warmia, NE Poland). As a result of the excavations by the Museum in Ostróda, and the Institute of Archaeology and Ethnology, a total of 131 XRISTIANA RELIGIO coins of Louis the Pious, Lothar I and Charles the Bald were discovered. This is the first hoard of Carolingian coins discovered in Poland, and one of the few in general that consists only of XRISTIANA RELIGIO type. The hoard consists of 128 deniers of Louis the Pious, one of Lothar I and two of Charles the Bald - all three from the very beginning of their reign, therefore this hoard is initially dated to around 840 AD.