The Prefecture of Preveza has numerous castles. The city of Preveza alone has four castles, from where in the old days all the personae non gratae from all around the peninsula were carefully inspected.

The most important castles are: 

• The Venetian Castle of Agios Andreas, next to the city’s coast, and further to the north the Bastion of Vrysoula were controlling the Gulf of Amvrakikos, while the Castle of Agios Georgios in Kyani Akti and the Castle of Pantokratoras were controlling the Ionian Sea. Except from the first one, all the others were built by Ali Pasha of Ioannina in 1807.
• The Castle of Parga is impressive and offers an astounding view to the city’s cove and the Ionian Sea. It was built by the Normans in the 14th century, but its current form was shaped by the Venetians.
• The Castle of Rogon, near the village of Nea Kerasounta, includes an acropolis and a Hellenistic fortification with roman and meta-byzantine additions. 
• The Castle in Riza was protecting the medieval city of Riniasa and it was probably built by the Despot of Epirus Thomas the First, at the end of the 13th century.
• In Pente Pigadia, located near Gorgomylos in Filippiada, there were two castles, built during the Ottoman Rule. One of them is well preserved until today.

Other castles of the area are:

• Riniasas, in Lygia
• Ayia
• Mpouka
• Pantokratoras