Denmark has two sets of online collections for all its museums.
This is a fully searchable database of all artworks in Danish state-owned and state-subsidised museums. It is in Danish and English, and can be searched by artist, artwork or museum and museum collection.
This website is for professionals as well as private individuals who seek information about Danish artists and Danish and foreign artworks in Danish museums.
The site contains Kunstindeks Danmark (Art Index Denmark), which is the central register of artworks and artists in the collections of Danish state-owned and state-subsidised museums. Information from the museums about artists is supplemented by information from the digital version of the Danish art lexicon Weilbach. Dansk Kunstnerleksikon (4. udg.) (Weilbach's Danish lexicon of artists, 4th edition), which is also available on this site.
Source:
https://www.kulturarv.dk/kid/Forside.do accessed 23 May 2022
2. Museernes Samlinger (Museums' Collections) is the central register of objects and other cultural-historical documentation material in state and state-recognized Danish museums of cultural history. Museernes Samlinger are the cultural-historical counterpart to Kunstindeks Danmark. It was established in 2004 with the aim of improving the museums' ability to prioritize their collections and coordinate their research activities.
All museums of cultural history in Denmark are listed on the site and each museun can be individually searched. The website also allows searches by subjects such as nature, people, costumes and homes. It also allows searches by time period.
The museums' own data
Source:
https://www.kulturarv.dk/mussam/Websted.action accessed 23 May 2022