Ducat, DUHK uht, is a coin first issued by Roger II of Sicily, Duke of Apulia, in the mid-1100's. It was called a ducat because it was issued by authority of a duchy. Later the coin was used in all southern European countries, either in silver or in gold. The silver ones were worth between 75 cents and $1.10, and the gold ones, $1.46 to $2.32.