Roppolo is in the Province of Biella in the Italian region Piedmont. Roppolo is located on the southern slopes of Ivrea glacial ridge, west to the Lake of Viverone.
Roppolo appeared for the very first time in the historical archives in 761 under the name of "Roppoli". It was not until in 816 that it appeared in the historical archives with its actual name "Roppolo". Later in 963, the castle was in the possession of two families of Roppolo and also the neighboring Counts of Cavaglia.
Through the years, originally a wooden fortress with only a tower built with bricks, Roppolo became an important fortress located at the frontier with the Ivrea Region. The castle is well known to have been one of the major fortified points of the “chiuse Langobards” of the region of the Canavese.