- artsandculture.google.com entity/constantin-…Carl Christian Constantin Hansen was one of the painters associated with the Golden Age of Danish Painting.
- ru.pinterest.com fligaro/constantin-hansen/Constantin Hansen (1804-1880): Portrait of Frederik Hammerich (1809-1877) in a black jacket and a blue waistcoat, 1834.
- vk.com album-173387284_267845177
- veryimportantlot.com ru/overview/author/author-…
- ru.ruwiki.ru wiki/Хансен,_Константин
- руни.рф Хансен,_Константин
- my.mail.ru mail/belochka-letyaga/photo/25327
- Gallerix.ru storeroom/466169695/
- biographies.net people/en/constantin_hansen