[4][5][6][7][8] Its construction commenced on November 4, 1715, during the Habsburg rule in Transylvania, and was completed in 1738.

20,000 serfs were involved in its construction, which is estimated to have cost around 3 million florins.

[8] The city received 47.5 million lei in 2009 for the restoration and conservation of the citadel.

[10] The citadel is named after Charles VI, known as Carol VI in Romanian, who was the Holy Roman Emperor at the time of the citadel's construction.

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