Ornässtugan, Medieval history museum in Borlänge, Sweden

Ornässtugan is a two-storey log building from 1504 with a jettied upper floor under a shingle roof, its walls clad in red-painted shingles and horizontal siding. The upper level has a continuous horizontal opening divided by red posts, and a gallery with red lattice railing runs along the lower level. A whitewashed stone cellar with two cross-vaulted rooms lies beneath, reached by a gabled entrance of plastered, whitewashed stone.

Ornäs is first mentioned in 1368; the loft's timber was felled in 1504, when the upper floor served as guest lodging and the ground floor as storage. In 1758 owner Jacob Brandberg opened a Gustav Vasa exhibition that remains unchanged, making it the world's oldest preserved exhibition in its original building. The state bought the loft and adjacent caretaker's house in 1897 for 7,150 kronor.

The name Ornässtugan alternates with Ornäsloftet, after the loft chamber where Gustav Vasa is said to have slept in 1520. The 1758 exhibition assembled by Jacob Brandberg still stands as he arranged it, with objects tied to the Vasa story. A 17th-century tradition holds that Arendt Pehrsson never spoke to his wife Barbro Stigsdotter again after she helped Gustav escape.

The four buildings stand together at Ornäs in Borlänge Municipality, Dalarna, with the smithy set apart on the shore of Lake Ösjön west of the farmyard. The loft building has a stone cellar with two cross-vaulted rooms reached through a whitewashed, gabled entrance, and an external spiral staircase on the east facade. The upper floor is reached by that staircase.

The site encompasses not just the main building but a complete settlement with four protected structures registered as cultural heritage since 1935. This ensemble of residence, loft, workshed, and smithy forms a rare intact depiction of a historical farmstead layout.