European explorers—first the Portuguese in search of the Spice Islands (Indonesia) and then the Spanish—reached the Carolines in the sixteenth century. The Treaty of Tordesillas gave these lands to Spain and the Spanish incorporated the archipelago to the Spanish East Indies through the capital, Manila, and in the 19th century established a number of outposts and missions. In 1887, they founded the town of ''Santiago de la Ascensión'' in what today is Kolonia on the island of Pohnpei.