Ionian Islands: Polity Style: 1815-1864 24 Oct/5 Nov 1815 the islands of Corfu, Cephalonia, Zakynthos (Zante), Lefkada (Santa Maura), Ithaca, Kythira (Cerigo), and Paxoi are organised as the United States of the Ionian Islands and placed under the protection of the monarch of the United Kingdom in accordance with a treaty between the United Kingdom, Austria, Russia, and Prussia concluded at Paris 5 Nov 1815 (Ionian Gazette, No. 83, 27 Jan 1816, pp. 3-4; Hansard Parliamentary Debates, 32:294-297) 24 Oct/5 Nov 1815 - 21 May/2 Jun 1864 United States of the Ionian Islands = Inomenon Kratos ton Ionion Nison (Hνωμένον Κράτος των Ιονίων Νήσων) = Stati Uniti delle Isole Jonie 17/29 Mar 1864 United Kingdom consents to relinquish protectorate over the Ionian Islands; United Kingdom, France and Russia recognize the union of the Ionian Islands with Greece in accordance with a treaty between United Kingdom, France, Russia, and Greece concluded at London 29 Mar 1864 (Xenos, 290-295) 21 May/2 Jun 1864 cessation of the protectorate of the United Kingdom and unification of the Ionian Islands with Greece take effect on a date specified in the proclamation dated 28 May 1864 and issued by the Lord High Commissioner (Ionian Gazette, No. 692 Extra, 16/28 May 1864, pp. 4-5; British and Foreign State Papers, 57:1078-1079) Last updated on: 22 May 2020 21:00:00