Originally Posted by servingsophie
Mette Marit looks incredibly beautiful. I assume the dress is based on traditional Norwegian costume?
This is actually not a traditional Norwegian costume. In the pictures you are refering to she is wearing a dress from around 1905 (I don't think it is from 1905, but is a replica). They might have gotten inspiration from Queen Mauds dresses from that period.
But I found a picture of CP Mette-Marit in a traditional Norwegian costume at www.nrk.no
This is a picture of CP Mette-Marit in one variety of the national costume of Norway (its generally called bunad). This is a bunad from Hardanger, which she got in her wedding. She also have a bunad from Vest-Agder that she has had since she was young.
It is used for special occasions such as the national day, weddings, christenings and even as a galadress at the palace (that is for invited guests, very often ministers of government, their spouses and members of parliament).
All members of the royal family, apart from the King, have several bunad. There has been a discussion about wether the royal family should wear bunad or not. Because bunad represent regions and counties in Norway, and the royal family should represent the entire country. But Queen Maud started the tradition so I don't think the royal family will stop using it, and I think that most Norwegian think it's ok that they wear bunad form some regions/counties.