When the Portuguese reached South-East Asia (Afonso de Albuquerque conquering Malacca in 1511) and the southern coast of China (Jorge Álvares reaching the Pearl River estuary in 1513), they started calling the country by the name used in South and South-East Asia. It was not immediately clear to the Europeans whether this "China" is the same country as "Cathay" known from Marco Polo. Therefore, it would not be uncommon for 16th-century maps to apply the label "China" just to the coastal region already well known to the Europeans (e.g., just Guangdong on Abraham Ortelius' 1570 map), and to place the mysterious Cathay somewhere inland.