In the history of Tuamotu, the Tuamotus were first discovered by a Spanish expedition led by Ferdinand Magellan in 1521. From the Inca Empire, Tupac Inca Yupanqui is also credited with leading a nearly 10-month voyage of exploration into the Pacific around 1480. None of these visits were of political consequence, the islands being in the sphere of influence of the Pomare dynasty of Tahiti. At the beginning 18th century the first Christian missionaries arrived. The islands' pearls penetrated the European market in the late 19th century, making them a coveted possession. Following the forced abdication of King Pomare V of Tahiti, the islands were annexed as an overseas territory of France.