A total of 7,756 Roman denarii have been found in Sweden, of which 6,578 on Gotland. Nearly all were struck in the period c. 50-193 A.D. The denarii found on Gotland are very heavily worn, while those found on the mainland are much less worn. The import to the mainland occured in the 2nd c., while the import to Gotland probably took place as late as the 4th c.