Ogier Ghiselin de Busbecq (1522 in Comines – 28 October 1592; Latin: Augerius Gislenius Busbequius; sometimes Augier Ghislain de Busbecq) was a 16th-century Flemish writer, herbalist and diplomat in the employ of three generations of Austrian monarchs. He served as ambassador to the Ottoman Empire in Constantinople and in 1581 published a book about his time there, Itinera Constantinopolitanum et Amasianum, re-published in 1595 under the title of Turcicae epistolae or "Turkish Letters".