Bunad (Norwegian plural: bunader) is a Norwegian umbrella term encompassing, in its broadest sense, a range of both traditional rural clothes (mostly dating to the 19th and 18th centuries) as well modern 20th-century folk costumes. In its narrow sense the word bunad refers only to clothes designed in the early 20th century that are loosely based on traditional costumes. The word bunad in itself is a 20th-century invention.
The bunad movement has its root in 19th-century national romanticism, which included an interest for traditional folk costumes not only in Norway, but also in neighbouring countries such as Denmark and notably Germany. However, in Norway national romanticist ideas had a more lasting impact, as seen in the use of folk inspired costumes.
Read more about Bunad: Designs and Popularity, Bunad Traditions in Norway, Design and Origins of Bunad, The Bunad Movement