Website for Avaldsnes: Noregs eldste kongesete (Norway's Oldest Royal Seat), which includes information about the Avaldsnes History Centre, Viking Farm, and background information about the Vikings, illustrated with images of re-enactors.
The National Museum of Denmark is Denmark's state museum. It oversees various other museums around Denmark and has a digital collection that can be searched.
Vikingmuseet Ladby was formerly Ladbyskipsmuseet. It has been much expanded since the original museum and work on it continues. It is now the home to the Department for Landscape and Archaeology.