Local road-builders used one of the mounds as a gravel-pit and in the process destroyed large parts of a richly equipped grave in a Viking ship.
The excavations uncovered an unusually good selection of craft work, much of which is on display at the Viking Ship Museum in Oslo.
This artistic craft work has become known as the Borre style and is today known for its beautiful animal and knot ornaments, which were often used for decorating harnesses.
[9] In October 2007 ground-penetrating radar (GPR) measurements conducted by the archaeological prospection unit of the Swedish Central National Heritage Board on behalf of Vestfold County Administration led to the discovery of the buried remains of two pre-historic hall buildings, the first substantial building remains discovered in the vicinity of Borre.
[12][13] In 2015 Erich Draganits et al. suggested that a prehistoric harbour is likely to have been located at Borre based on the analysis of geomorphological features.