sentences:  The museum's coin collection was established around 1840 and contains approximately 50,000 coins, medallions, bank notes, and chips.The most important part of the collection contains coins from the Viking Age and the Middle Ages, discovered at archaeological excavations, along with some incidental finds in Romsdal, Nord-Møre, Trøndelag, and the southern parts of Nordland.The collection also contains donations, like the Arne E. Holm's collection of Greek, Roman, and Byzantium coins and Anton Røstad's collection of European coins and bank notes from the 18th, 19th, and 20th centuries.