Ibn Battuta was a Moroccan explorer who traveled extensively throughout the known world. His accounts of his exploits were published in a book known simply as Journey. His travels lasted three decades, during which he visited many parts of Africa, Asia, and Europe. In all, he covered a distance about three times as great as Marco Polo, who lived at about the same time. As such, Ibn Battuta is considered one of the great explorers of the medieval period.