The Reunia Castle was built in San Pietro in the sixth century AD, near the left banks of the Tagliamento River. Initially, it was supposed to preside over the road heading to the Norico. Despite scarce and controversial records available, we know that the building became later part of the feudal system.
Inhabited by various noble families, such as Eppenstein, von Wallenstein and Porcia over the centuries, the castle was badly damaged by an earthquake (1511) and a fire (1560) in the sixteenth century. His owners abandoned it and it was eventually donated to the Municipality of Ragogna at the end of the eighteenth century. Under the Kingdom of Italy, the castle and the zone along the Tagliamento underwent deep fortification work as the area was considered as highly strategic.
Along the access road, you can see a memorial stone dedicated to Corporal Angelo Ruggeri, in service at the 4th Division of the Second Digger Regiment, who perished on 02nd August 1909, during the fortification of Mt. Ragona. On 30th and 31st October 1917 instead, the castle played a role during the resistance opposed by the Bologna Brigade against the advance of the Austro-German army.
