The Portuguese arrived on the Central African coast north of the Congo river, several times between 1472 and 1483 searching for a sea route to India, but they failed to find any ports or trading opportunities. In 1483, south of the Congo river they found the Kongo people and the Kingdom of Kongo, which had a centralized government, a currency called "nzimbu", and markets, ready for trading relations. The Portuguese found well developed transport infrastructure inlands from the Kongo people's Atlantic port settlement. They also found exchange of goods easy and the Kongo people open to ideas. The Kongo king at that time, named Nzinga a Nkuwu allegedly willingly accepted Christianity, and at his baptism in 1491 changed his name to João I, a Portuguese name.