Italy, France, Portugal and even Scotland are among those who have claimed Christopher Columbus as their own over the years, citing a range of spurious links.

But American researchers say the mystery over the explorer's true origins has finally been solved after a thorough investigation of his writings.

A study of the language used in the official records and letters of the Great Navigator apparently proves he hailed from the Kingdom of Aragon in northeastern Spain and his mother tongue was Catalan.

Since his death in 1506 debate has raged over the true nationality of the man credited with discovering the Americas.

It was widely believed that he was the son of a weaver born in the Italian port of Genoa, but over the centuries he has been claimed as a native son of Greece, Catalonia, Portugal, Corsica, France and even Poland.