Gjirokastër Castle (Albanian: Kalaja e Gjirokastrës or Kalaja e Argjirosë) is a fortress in Gjirokastër, Albania (during Ottoman rule it was historically known as Ergiri while local Greeks referred to it as Argyrokastro, a name applied also to the castle).

[1] The castle dominates the town and overlooks the strategically important route along the river valley.

It is open to visitors and contains a military museum featuring captured artillery and memorabilia of the Communist resistance against German occupation, as well as a captured United States Air Force plane to commemorate the Communist regime's struggle against the Western powers.

Princess Argjiro inspired Albanian author Ismail Kadare in a poem he wrote in the 1960s.

[2] According to local Albanian folkloric traditions she lived in the 15th century and jumped off Gjirokastër Castle along with her child so as to avoid being captured by the Ottomans.