The castle was built in 1807, when the region was governed by Ali Pasha of Tepeleni, a semi-autonomous Ottoman ruler of Epirus.
It was the first major architectural intervention of Ali Pasha in Preveza, after he recaptured it in late November 1806.

Ali Pasha pressed François Pouqueville, the French consul stationed in Ioannina, to send for officers and supplies from Napoleon’s troops, as he was particularly interested in securing military engineers who could assist in the construction of new fortifications in the region, and particularly at Preveza and the camps positioned against the Russian troops still stationed on Lefkada.
The castle was initially called by the Ottomans Yeni kale (the new castle), but a few years later (around 1815) another castle took this name, as it was newer than the one we are talking about.
The castle was afterwards named Hizir kalesi (the castle of the Green) or (the barracks castle).

St. George's castle, as it was named after 1912, was designed by French engineers, who also oversaw the construction of the fort.
It was constructed at the southern edge of Preveza in order to defend the narrow water channel leading from the Ionian Sea into the Gulf of Arta.

For the construction, Ali Pasha hired two French military engineers; Captain Ponceton, and colonel Frédéric François Guillaume de Vaudoncourt, to assist in the design and execution of the plan.
He, also, brought in several hundreds of Greek workers and stonemasons from many areas of his territory, who worked by compulsory labour and without pay for the project, which was concluded in less than a year's time.

It seems likely that Ali Pasha refused to realize de Vaudoncourt's proposed designs, thus taking all the credit for constructing the military works in Preveza.

Based on the hand-written reports of the then colonel de Vaudoncourt we can precisely date the construction of the castle.
The works started in February 1807 and were completed in the autumn of the same year.
The castle was built in 1807, when the region was governed by Ali Pasha of Tepeleni, a semi-autonomous Ottoman ruler of Epirus. It was the first major architectural intervention of Ali Pasha in Preveza, after he recaptured it in late November 1806.
Ali Pasha pressed François Pouqueville, the French consul stationed in Ioannina, to send for officers and supplies from Napoleon’s troops, as he was particularly interested in securing military engineers who could assist in the construction of new fortifications in the region, and particularly at Preveza and the camps positioned against the Russian troops still stationed on Lefkada. The castle was initially called by the Ottomans Yeni kale (the new castle), but a few years later (around 1815) another castle took this name, as it was newer than the one we are talking about. The castle was afterwards named Hizir kalesi (the castle of the Green) or (the barracks castle).
St. George's castle, as it was named after 1912, was designed by French engineers, who also oversaw the construction of the fort. It was constructed at the southern edge of Preveza in order to defend the narrow water channel leading from the Ionian Sea into the Gulf of Arta.
For the construction, Ali Pasha hired two French military engineers; Captain Ponceton, and colonel Frédéric François Guillaume de Vaudoncourt, to assist in the design and execution of the plan. He, also, brought in several hundreds of Greek workers and stonemasons from many areas of his territory, who worked by compulsory labour and without pay for the project, which was concluded in less than a year's time.
It seems likely that Ali Pasha refused to realize de Vaudoncourt's proposed designs, thus taking all the credit for constructing the military works in Preveza.
Based on the hand-written reports of the then colonel de Vaudoncourt we can precisely date the construction of the castle. The works started in February 1807 and were completed in the autumn of the same year.
St. George's Castle, Preveza