The Portuguese Empire was the first global empire in history, spanning from the 15th to the early 20th century. It began with the conquest of Ceuta in North Africa in 1415, establishing Portugal's long-lived overseas presence. The empire grew significantly in the 15th and 16th centuries during the Age of Discovery through Portugal's navigation developments, establishing trading posts and colonies in Africa, Asia, and Brazil. However, over the following centuries Portugal's spice and slave trades were overtaken by other European powers and its empire declined militarily.