In the 1919 Venizelos-Tittoni Agreement, Italy promised to cede the overwhelmingly Greek-inhabited islands, except Rhodes, to Greece, but this treaty was never implemented due to the Greek catastrophe in Asia Minor.
[2] From 1923 to 1936, governor Mario Lago was able to integrate the Greek, Turkish and Ladino Jewish communities of the island of Rhodes with the Italian colonists.
[4] During World War II, Italy joined the Axis Powers, and used the Dodecanese as a naval staging area for its invasion of Crete in 1940.
The Germans prevailed, and although they were driven out of mainland Greece in 1944, the Dodecanese remained occupied until the end of the war in 1945, during which time nearly the entire Jewish population of 6,000 was deported and killed.
The citadel of Rhodes city is a UNESCO World Heritage Site thanks in great part to the large-scale restoration work carried out by the Italian authorities.
Furthermore, in those years an "Institute for the study of the History and Culture of the Dodecanese region" was established, and major infrastructure work was done to modernize Rhodes.