The Ionian Bank was a bank of issue established in 1839 in London to operate in the United States of the Ionian Islands, which was then a British protectorate. The bank moved its head office in Greece from Corfu to Athens in 1873, and expanded in Greece and the Eastern Mediterranean, including through the acquisition of Greece's Popular Bank in 1938. After losing its branches in Egypt to nationalization in 1956, the British parent entity sold its operations outside the United Kingdom. The Greek business, renamed Ionian and Popular Bank and nationalized in 1975, was eventually absorbed into Alpha Bank in 2000.