Flesberg stave church was probably built around 1200. The first written reference to the church is from 1359. The church was originally a single nave church with four free-standing internal posts bearing a raised central roof, surrounded by an ambulatory or aisles on all four sides. It had a narrower chancel, also with a raised central roof, and a semicircular apse. It was surrounded by a gallery loosely connected to the plank walls.
In 1735, the chancel and apse as well as the east wall of the nave were removed. The nave was extended eastwards and two transepts were added, making a cruciform plan. The additions were built in horizontal log construction with notched corners. Of the original stave church only three outer walls survived, as the internal posts and the raised roof were eliminated.
The church yard is fenced with big slates brought from Haukeli farm (on the Lågen west bank) during winter seasons. Some slates have iron rings affixed, these rings were used for tying horses during service - each farmer had a designated ring for his horse (the oldest dated ring from 1661). The idiosyncratic stone fence is shown on a 1701 painting (the oldest existing painting of a stave church).
References:The Basilica of Santa Maria in Trastevere is one of the oldest churches of Rome. The basic floor plan and wall structure of the church date back to the 340s, and much of the structure to 1140-43. The first sanctuary was built in 221 and 227 by Pope Callixtus I and later completed by Pope Julius I.
The inscription on the episcopal throne states that this is the first church in Rome dedicated to Mary, mother of Jesus, although some claim that privilege belongs to the Basilica di Santa Maria Maggiore. A Christian house-church was founded here about 220 by Pope Saint Callixtus I (217-222) on the site of the Taberna meritoria, a refuge for retired soldiers. The area was made available for Christian use by Emperor Alexander Severus when he settled a dispute between the Christians and tavern-keepers.
The church underwent two restorations in the fifth and eighth centuries and in 1140-43 it was re-erected on its old foundations under Pope Innocent II.