It was owned by Hungarian kings and nobleman from the 12th century until the territory became part of Czechoslovakia after the Treaty of Trianon in 1920 and was acquired by a Czech entrepreneur in 1939.

Originally built as a wooden fort, it was gradually replaced by stone, with the outer walls being shaped according to the uneven rocky terrain.

The Thurzós, the richest family in the northern Kingdom of Hungary, acquired the castle in 1528 and undertook its major reconstruction.

He expressed his wish that the castle be made available to the public and that the works of art remain in their original places and be viewed by all interested parties.

However, Jan Pálfi's heirs contested the will in court as they sold off the valuable and used the Bojnice estate as an economic base.

That agreement sheltered much of the collection, specifying that it could not be sold at private auction and remained in the ownership of the state.In 1941, the administration of Bojnice Manor allowed the Upper Nitra Museum Association to place its archeological, ethnographic, ethnological, and historical collections on castle grounds, in the Winter Garden.

The KNV in Nitra agreed and established The Regional Museum of Local History at Bojnice Castle through resolution no.

The museum ended its advisory role and transitioned to a research and documentation center focusing on the Upper Ponitri.

Evidence suggests that ancient inhabitants of the region and castle knew about the cave, using it as a shelter and water reservoir.

The collection includes: fine arts (paintings, sculptures), housewares (furniture, clocks, chandeliers and candlesticks, ceramics, earthenware, faience, porcelain), tools (weapons, craftsman supplies), and apparel (armor, textiles).