Built in the 14th century, on the place of an old fortification, on a rock at which bottom flows the little river Zlasti, the castle is a great building, with high and diversely colored roofs, towers, windows and balconies adorned with laces from carvings in stone.

being one of the most important properties of Iancu de Hunedoara, the castle was transformed during his ruling. It becomes a sumptuous home, not only a strategically enforced point. With the passing of the years, the masters of the castle had modified its look, adding towers, halls and guest rooms. The gallery and the donjon - the last defense tower (the tower "Ne boisa" = Do not be afraid), remain unchanged from Iancu de Hunedoara's time, as the Capistrano Tower (named after the famous monk from the castle court) are some of the most significant parts of the construction. Can be remembered also the Knights Hall (a great reception hall), Clubs Tower and the White bastion which served as food storage room, the Diet Hall, having on the walls painted medallions (among them there are the portraits of Matei Basarab, ruler from Wallachia, and Vasile Lupu, ruler of Moldavia). In the wing of the castle called the Mantle is seen vaguely enough, a painting regarding the legend of the raven from which came the name of the descendants of Iancu de Hunedoara: Corvini (in Romanian raven is "corb")

In the yard of the castle, near the chapel built also during Iancu de Hunerdoara's ruling, is a well, 30 meters deep. The legend says that this fountain was dug by three Turkish prisoners, to whom their liberty was promised if they reach water. After 15 years, when they have finished the well, the masters did not keep their promise. It says that the inscription from the wall of the well means "you have water, but not soul". But the specialist decrypted the inscription and it means "he who wrote this inscription is Hasan, who lives as slave for the "ghiauri" (Turkish term given to Romanians) in the fortress near the church".