The dates of European arrival are sometimes given as 21 December (St Thomas's Day) 1471, for São Tomé; and 17 January (St Antony's Day) 1472, for Príncipe, though other sources cite different years around that time. Príncipe was initially named ''Santo Antão'' ("Saint Anthony"), changing its name in 1502 to ''Ilha do Príncipe'' ("Prince's Island"), in reference to the Prince of Portugal to whom duties on the island's sugar crop were paid.