Polish złoty
In 2012, Marek Poznański, Polish archaeologist and member of the Sejm, assumed that each ducat had 3.5 grams of 986 gold and calculated that at 2012 gold prices, without interest, the loan was worth 235 million Polish złoty or 57 million euros. The Polish Ministry of Foreign Affairs replied that it was not a loan from the Polish government, but from Bona as an individual; therefore, if the statute of limitations had not expired, the claim should be pursued by Bona's descendants.