Borgund Stave Church (Borgund stavkyrkje) is a former parish church of the Church of Norway in Lærdal Municipality in Vestland county, Norway. It was built around the year 1200 as the village church of Borgund, and belonged to Lærdal parish (part of the Sogn prosti (deanery) in the Diocese of Bjørgvin) until 1868, when its religious functions were transferred to a "new" Borgund Church, which was built nearby. The old church was restored, conserved and turned into a museum. It is funded and run by the Society for the Preservation of Ancient Norwegian Monuments, and is classified as a triple-nave stave church of the Sogn-type. Its grounds contain Norway's sole surviving stave-built free-standing bell tower.
Borgund Stave Church was built sometime between 1180 and 1250 AD with later additions and restorations. Its walls are formed by vertical wooden boards, or staves, hence the name "stave church." The four corner posts are connected to one another by ground sills, resting on a stone foundation. The intervening staves rise from the ground sills; each is tongued and grooved, to interlock with its neighbours and form a sturdy wall. The exterior timber surfaces are darkened by protective layers of tar, distilled from pine.
Borgund is built on a basilica plan, with reduced side aisles, and an added chancel and apse. It has a raised central nave demarcated on four sides by an arcade. An ambulatory runs around this platform and into the chancel and apse, both added in the 14th century. An additional ambulatory, in the form of a porch, runs around the exterior of the building, sheltered under the overhanging shingled roof. The floor plan of this church resembles that of a central plan, double-shelled Greek cross with an apse attached to one end in place of the fourth arm. The entries to the church are in the three shorter arms of the cross.
Structurally, the building has been described as a "cube within a cube", each independent of the other. The inner "cube" is formed by continuous columns that rise from ground level to support the roof.