The building works at Deva’s Stronghold started in XIII century with the purpose of creating a military fortress. Later transformed by Iancu de Huedoara in residential castle, it was extended and reinforced in the XVI, XVII and XVIII centuries, becoming one of the strongest fortifications in Transylvania. The stronghold was often sieged by the Ottomans in 1550, 1552, 1557. In 1784 Horea’s ultimatum was submitted to the nobles in the castle and in 1848 was the headquarters of the imperial aids which intervened against the Hungarian revolution. After being bombed in 1849, the stronghold became a ruin on the top of a sloppy hill.
On the hills there are the ruins of the many defensive walls which observes the level curves, being reinforced with square or round towels and monumental gates. In the main enclosure one can find the ruins of the nobiliary palace. The Palace Magna Curia (today the Muzeum of Dacian and Roman Civilization) is located below the hill of the stronghold, being built in the XVI century. Transformed by Gabriel Bethlen in 1621, Magna Curia got a Baroque style i the XVIII century when a monumental stair and specific baroque balcony were built.