The regional unit of Preveza is located northwest of theAmbracian Gulf. TheIonian Sea lies to the west. The terrain is mostly hilly. The mountains ofXerovouni are in the far northeast. Rivers include theLouros in the east, andAcheron in the north.
Its climate is typically Mediterranean with hot dry summers and cool winters. Snow is not uncommon in winter at higher elevations.
Preveza was established as aprefecture in 1915 (Greek:Νομός Πρέβεζας). As a part of the 2011 Kallikratis government reform, the regional unit Preveza was created out of the former prefecture Preveza. The prefecture had the same territory as the present regional unit. At the same time, the municipalities were reorganised, according to the table below.[2]
The area was first settled by the Greek tribe of theThesprotians and subsequently formed part of theKingdom of Epirus and later theRoman Empire. TheBattle of Actium took place in the area in 31 BC, following which the city ofNicopolis ("city of victory") was built by Augustus. The area became part of theByzantine Empire, and following theFourth Crusade, split off along with the rest of Epirus to form theDespotate of Epirus. The area passed toOttoman rule in the 14th century, which lasted until 1913. Following theBalkan Wars, the area was awarded to Greece in 1913, at which point the prefecture was created. The prefecture included the island of Lefkada, until the latter was split off in 1955 as a separate prefectureLefkada.
The ruins of the ancient cities ofNicopolis andCassope, and theNecromanteion lie in the prefecture.Zalongo is a mountain village, known for its monastery.Parga is a historic port town and a resort.