The history museum was established on the 1st of March 1958, at Târgu Ocna, and transferred to Oneşti in 1962. The exhibition presents archaeological and local history items: silex and horn tools from Târgu Ocna, objects uncovered at Borzeşti, Căbeşti, Viişoara, mediaeval vestiges from Târgu Trotuş, coins collection and Eneolithic Cucuteni culture items.