Magna Curia ("the Great Court"), also known as Bethlen Castle, is the low, dignified Renaissance palace at the foot of Citadel Hill. It was built in the late sixteenth century and remodelled in 1621 by Prince Gabriel Bethlen of Transylvania, then again in the Baroque style in 1733. The exterior has loggias, painted scrolls, and an ornamented portal; the courtyard is open during museum hours.
The building now houses the Museum of Dacian and Roman Civilisation. The combined visit — palace plus museum collections — is the strongest indoor stop in Deva.