To the south, the regime claimed the archipelago of Malta, which had been held by the British since 1800. Mussolini claimed that the Maltese language was a dialect of Italian and theories about Malta being the cradle of the Latin civilization were promoted. Italian had been widely used in Malta in the literary, scientific and legal fields and it was one of Malta's official languages until 1937 when its status was abolished by the British as a response to Italy's invasion of Ethiopia. Italian irredentists had claimed that territories on the coast of North Africa were Italy's Fourth Shore and used the historical Roman rule in North Africa as a precedent to justify the incorporation of such territories to Italian jurisdiction as being a "return" of Italy to North Africa. In January 1939, Italy annexed territories in Libya that it considered within Italy's Fourth Shore, with Libya's four coastal provinces of Tripoli, Misurata, Benghazi and Derna becoming an integral part of metropolitan Italy. At the same time, indigenous Libyans were given the ability to apply for "Special Italian Citizenship" which required such people to be literate in the Italian language and confined this type of citizenship to be valid in Libya only. Tunisia that had been taken by France as a protectorate in 1881 had the highest concentration of Italians in North Africa and its seizure by France had been viewed as an injury to national honour in Italy at what they perceived as a "loss" of Tunisia from Italian plans to incorporate it. Upon entering World War II, Italy declared its intention to seize Tunisia as well as the province of Constantine of Algeria from France.