The history of the island of Taiwan dates back tens of thousands of years to the earliest known evidence of human habitation. The sudden appearance of a culture based on agriculture around 3000 BC is believed to reflect the arrival of the ancestors of today's Taiwanese indigenous peoples. The island was colonized by the Dutch in the 17th century, followed by an influx of Hoklo people including Hakka immigrants from the Fujian and Guangdong areas of mainland China, across the Taiwan Strait. The Spanish built a settlement in the north for a brief period but were driven out by the Dutch in 1642.