Marsilio Ficino (1433–1499), an Italian physician, humanist philosopher, and Catholic priest, wrote the popular De vita libri tres. First published in 1489, the book is a unique blend of medieval medicine, natural magic, astrology, theology, and ideas of ancient Greek philosopher Plato (ca. 428–ca. 347 BCE). The book is in three parts: the first, De vita sana (On Healthy Life), helps melancholic scholars live healthy lives; De vita longa (On Long Life) explains how to prolong one’s life; and finally, De vita coelitus comparanda (On Obtaining Life from the Heavens) explores astrological and spiritual magic.