Preveza became an important transit center in northwest Greece following its liberation in 1912. The needs of the merchant marine led to the installation of a beacon from the Swedish company AGA in 1929. It operated with acetylene, a cheap and safe gas that did not require expensive installations or the presence of a lighthouse keeper. The light was visible to a distance of 5.5 kilometers. In the 1960s the beacon was lost during the harbour’s renovation and expansion. A replica was installed in 1998.