When Ali Pasha conquered Preveza, in 1807, he proceeded rapidly with the restoration of the castle, that was lying in a ruinous state as a result of many years of neglect. He employed hundreds of Christian workers under the supervision of his favorite architect, a man from Korçë called Peter, to improve the bastions, rebuild the stone walls, and widen the moat. He commemorated the work with a stone inscription, above the monument to the Greek war dead in the southeast bastion. The inscription carries the Arabic phrase “Masha' Allah” ("God has willed it") and the Islamic date 1223 (which is the year 1808 in the western calendar).