The Treaty of Tordesillas purported to give Portugal the right to colonise this part of world. In 1507, Portuguese sailors came to the uninhabited island and established a visiting base. Diogo Fernandes Pereira, a Portuguese navigator, was the first European known to land in Mauritius. He named the island "Ilha do Cisne" ("Island of the Swan"). The Portuguese did not stay long as they were not interested in these islands.