Setesdal (; older name: Sætersdal) is a valley and a traditional district in Agder County in southern Norway. It consists of the municipalities of Bykle, Valle, Bygland, Iveland, and Evje og Hornnes. The Otra river flows through the valley of Setesdal into the sea near Kristiansand. It flows southward from the Hardangervidda plateau in Telemark. The historic Setesdal starts at Evje and extends as far as the farm Bjåen, at the edge of the traditional region of Telemark. Øvre (Upper) Setesdal is in the municipality of Bykle. The municipalities of Iveland, Evje & Hornes and Bygland comprise the Nedre (Lower) Setesdal. Valle municipality is in the middle of the Setesdal valley. Norwegian National Road 9 runs through Setesdal. Etymology The oldest Norse form of the name was just Setr, and this was later replaced by Setrsdalr ('the dale/valley of Setr'). The common word setr has the meaning 'homestead, farm' – and Setr was probably originally the name of an old, large farm in the central part of Valle. The old farm was then later divided into a lot of smaller parts, but the name survived as the name of the district. History The Historia Norwegiæ, a short history of Norway written by a monk in the second half of the 12th century, reports that Setesdal was then part of the law district "Telemark with Råbyggelag". A Raabygger or Råbygger is one who lives in a corner; this is an apt description for the valley of Setesdal, which runs like a wedge into the heights of the mountain called Haukelifjell. Ascending the Otra valley from Evje, one reaches the lake Byglandsfjord. At this point one historically found one of the more pronounced cultural transitions in Norway; there was a radical change in racial characteristics, dress (folk costumes or Bunad), architecture, dialect, folk music, dance (e.g., the ganger, a form of Bygdedans), customs, and cuisine. Particularly obvious north of the mountain pass of Byklestigen, the people of upper Setesdal were observed to be more closely related in blood and speech to their eastern neighbours in Telemark, as well as their immediate neighbours in adjoining districts of Rogaland to the west than to those people down the valley. Between Valle in Setesdal on the western side of the mountains and Fyresdal on the eastern side, one finds a medieval trail that priests and bishops used to get between the counties of Agder and