Soimos fortress (Solymosvár in hungarian), near Lipova, about 40 kms from Arad (East direction, to Transylvania), you´ll find this hungarian fortress from XIII century, the king Bela IV ordered its construction to avoid the attacks, specially after the mongol invasion during the middle of the XIII century.Thus, the king ordered to construct such that fortresses in Soimos, Dezna and Siria in the Arad "Judet" (zone). Later would come the turkish attacks.
The rest nowadays is history. Enjoy the views from the top of the mountain!!