European exploration and settlement of Oceania began in the 16th century, starting with the Spanish (Castilian) landings and shipwrecks in the Mariana Islands, east of the Philippines. This was followed by the Portuguese landing and settling temporarily (due to the monsoons) in some of the Caroline Islands and Papua New Guinea. Several Spanish landings in the Caroline Islands and New Guinea came after. Subsequent rivalry between European colonial powers, trade opportunities and Christian missions drove further European exploration and eventual settlement. After the 17th century Dutch landings in New Zealand and Australia, but not settling these lands, the British became the dominant colonial power in the region, establishing settler colonies in what would become Australia and New Zealand,