By 1516 several Portuguese navigators, conflicting with King Manuel I of Portugal, had gathered in Seville to serve the newly crowned Charles I of Spain. Among them were explorers Diogo and Duarte Barbosa, Estêvão Gomes, João Serrão and Ferdinand Magellan, cartographers Jorge Reinel and Diogo Ribeiro, cosmographers Francisco and Ruy Faleiro and the Flemish merchant Christopher de Haro. Ferdinand Magellan—who had sailed in India for Portugal up to 1513, when the Maluku Islands were reached, kept contact with Francisco Serrão living there—developed the theory that the islands were in the Tordesillas Spanish area, supported on studies by Faleiro brothers.