The dirham or dirhem was a coin of pure silver weighing 2.97 grammes, and worth one-tenth of a dinar. It was minted both in North Africa and in Central Asia under various dynasties. It was standard currency in Eastern Europe in the era before local mints existed. Hoards of dirhams have been found all over European Russia, Ukraine, Byelorussia, the Baltic States, Sweden, and northern Poland. The largest of them contained over 50,000 coins. Buried by their owners in times of insecurity, they sometimes remained uncollected until found by modern archaeologists and treasure-hunters.