Nicopolis or Actia Nicopolis was the capital city of the Roman province of Epirus Vetus. It is located near Preveza, Greece. The city was founded in 29 BC by Octavian in commemoration of his victory in 31 BC over Antony and Cleopatra at the Battle of Actium nearby.

The province of Epirus was a province of the Roman Empire, covering the region of Ancient Epirus. Rome first annexed the region in 167 BC, in the aftermath of the Third Macedonian War, and initially put the region in the larger Roman province of Macedonia, which at the time covered the whole of the Hellenistic world in mainland Europe. In 27 BC, Epirus and Achaea were separated from Macedonia and grouped into the senatorial province of Achaea, with the exception of its northernmost part, which remained part of the province of Macedonia. Under Emperor Trajan, sometime between 103 and 114 AD, Epirus became a separate province, under a procurator Augusti. The new province extended from the Gulf of Aulon (Vlorë) and the Acroceraunian Mountains in the north to the lower course of the Acheloos River in the south, and included the northern Ionian Islands of Corfu, Lefkada, Ithaca, Cephallonia, and Zakynthos.