 In the 1540s novgorodkas depicting a horseman with a spear (Russian копьё ("kop'yo")) began to be made, and novgorodkas were thenceforth known as kopeks.The minting of silver dengas seems to have decreased after the 16th century, as they are found less often in hoards, but they are known until the reign of Peter the Great.By that time the coinage had devalued so far that dengas weighed only about 0.14 grams, and were of little practical use.