It is one of four so-called "ironworks castles" built in the area during the 16th and early 17th centuries by owners of local iron-mining and -processing facilities, in what were then the clustered settlements of Plavž, Sava, Murova and Javornik, amalgamated into the town of Jesenice in 1929.
It is located in what was then the heart of the Murova settlement, at the foot of the path leading to the Church of St. Leonard atop a small hill a few hundred metres away.
The manor is mentioned in period documents as the "old belopeš castle," in reference to the ancestral home of its builders the Bucelleni family, the village of Bela Peč ("White Furnace," Italian: Fusine), between Rateče and Tarvisio in present-day Italy.
The manor obtained its current name in 1821, when its then-owner, the local merchant Frančišek Pavel Kos, enlarged and renovated it in neoclassical style.
At some point thereafter it was acquired by the Ruard family, from whom it passed into the hands of the KID company in 1872, by then the sole operator of the local ironworks.