The Historical Museum is actually three museums under one roof. Most interesting is the ground-floor National Antiquities Collection (Oldsaksamlingen), which has displays of Viking-era coins, jewellery and ornaments. Look out for the 9th-century Hon treasure (2.5kg), the largest such find in Scandinavia. A section on medieval religious art includes the doors and richly painted ceiling of the Ål stave church (built around 1300).
The second level has an Arctic exhibit and the Myntkabinettet, a collection of the earliest Norwegian coins from as far back as AD 995. Also on the second level, and continuing on the top floor, is the Ethnographic Museum , with changing exhibits on Asia, Africa and the Americas.