Belon was first trained as an apothecary, and worked in that capacity for the bishop of Clermont, Guillaume Duprat. Around 1542 he studied medicine In Paris, and obtained a licentiate in medicine, though he never took the formal degree of doctor. With the recommendation of Duprat, he became an apothecary to Cardinal François de Tournon. Under this patronage, he was able to undertake extensive scientific voyages and travels. Beginning in 1546, he travelled through Greece, Crete, Asia Minor, Egypt, Arabia and Palestine, and returned in 1549. He hoped to find the remains of Homer's Troy in the Levant. His Observations, an account of these travels, included numerous woodcut illustrations. Digital facsimile of the 1553 edition from the Internet Archive at this link. Translated into English by James Hogarth as Travels in the Levant: The observations of Pierre Belon of Le Mans on many singularities and memorable things found in Greece, Turkey, Judaea (2012).