非洲的君士坦丁1050—1087

There is some debate about his birth and family religion, although it is well known that he ended his life as a monk at the Latin Christian Abbey of Monte Cassino, in southern Italy. This religious controversy suggested that he might have been born as a Muslim, and after migration converted to Catholic Christianity, or he might have been born as a Christian within an Arabic-speaking family. The native language of Constantine the African was Arabic. He was also fluent in Greek, Latin, and other languages, the skills he acquired during his extensive travels. His journey included Egypt, Syria, India, Ethiopia, and Persia. He was well-versed in medical knowledge before his arrival to Salerno in Italy where he joined the abbey of Monte Cassino south of Rome in 1077.

It was in Italy where Constantine compiled his vast opus, mostly composed of translations from Arabic sources. He translated into Latin, books of the great masters of Arabic medicine: Razes, Ibn Imran, Ibn Suleiman, and Ibn al-Jazzar; these translations are housed today in libraries in Italy, Germany, France, Belgium, and England. They were used as textbooks from the Middle Ages to the seventeenth century.

The historians of Constantine

The 12th-century monk Peter the Deacon is the first historian to write a biography of Constantine. He noted that Constantine was a Saracen, the medieval Franco-Italian term for a Muslim from North Africa. According to Peter, Constantine traveled through Babylon, India, and Ethiopia, where he became versed in science, before coming to Monte Cassino as a refugee from peers in Carthage jealous of his knowledge. However, Peter's legendary portrayal of Constantine has been questioned by some historians. Still, later historians such as Salvatore de Renzi and Charles Daremberg, curator of the National Library in Paris, and Leclerc, author of History of Arab Medicine, relied on this account. The German Moritz Steinscheider wrote a book dedicated to Constantine, which was printed in Berlin in 1865.

Emigration to Italy

According to Karl Sudhoff, Constantine emigrated first to Italy as a merchant (mercator) in Sicily, moving to Salerno, where he was called Constantine Siculus. As Constantine spoke no Italian, a North African doctor named Abbas of Curiat, from an island lying off the city of Mahdia in Ifriqiya (modern-day Tunisia), became his interpreter. Suffering from an illness, he took refuge with the king's brother Gusulf, where he noted that Abbas did not ask for the usual bottle of urine, and the doctor who came to examine him was inexperienced. After asking in vain to see any good Italian books on medicine, he concluded that medicine in Italy was limited to simple practical knowledge. Already having an extensive general knowledge, Constantine discovered a mission in life.

After recovering, Constantine returned to Carthage in Ifriqiya, and practiced medicine for three years, collecting many books of medicine, then returned to southern Italy with his treasure.

Scientific production

Constantine arrived at Cassino, bringing with him the manuscripts of medicine that he took from Tunis. They include works of the Kairouanese El Baghdadi:

The Kairouanese books

The book of melancholy of Ishaq Ibn Imran.

The book of the pulse, urine and food regime of Ibn Ishaq Suleiman.

The book "Zad Al Mussāfir" (Viaticum or Viaticus peregrinantis) of Ahmed Ibn Al Jazzar.

The Baghdadi books

The book "Al Hawi" of Abu Bakr Al Razi

The book "Al Kamil" of Ali Ibn Al Abbas Al Majoussi, at least in part. Constantine translated the first ten books (on the theory of medicine) but his translation of the second ten books (on practice) do not entirely survive. (The same book was retranslated in the twelfth century by Stephen of Antioch, who was dismissive of Constantine's translation.)

Editions of Constantine's works

Constantine's works are most readily available in two sixteenth-century printed editions, the 1515 Lyons edition and the 1536 Basel edition. (Both editions are readily available online.) The Basel edition is missing some of Constantine's prefatory material, but Mark Jordan notes that, while both Basel and Lyons editions are problematic, and have undergone some humanistic retouching, the Basel edition may be more reliable. Modern scholars of the history of medicine, however, have tended to refer to the Lyons edition.

A recent and scholarly edition of the De Coitu is Constantini Liber de Coitu = El tratado de andrología de Constantino el Africano (Santiago de Compostela: Secretariado de Publicaciones de la Universidad de Santiago, 1983), with accompanying Spanish translation.

The Isagoge of Johannitius, which Constantine may have translated (the attribution is contested), has been edited by Gregor Maurach in Sudhoffs Archiv 62 (1978).

English translations

Two English translations of De Coitu are readily available:

Delany, Paul. "Constantinus Africanus' De Coitu: A Translation." Chaucer Review 4, no. 1 (Summer 1969): 55-65.

Wallis, Faith, ed. Medieval Medicine: A Reader (Toronto: University of Toronto Press, 2010), pp. 511–523.

The preface to Constantine's Pantegni is also available:

Eric Kwakkel and Francis Newton, Medicine at Monte Cassino: Constantine the African and the oldest manuscript of his Pantegni (Turnhout, 2019), pp. 207-209.

The legend of Constantine

In his introduction of the complete works of Ambroise Pare, here what Doctor Malgaigne writes:

"Constantine was born in Carthage and taken with an ardent desire to learn all sciences he went to Babylonia, learned grammar, logic, physics (medicine), geometry, arithmetic, mathematics, astronomy, necromancy, and music. After exhausting all sciences of the Chaldeans, Arabs and Persians he went to India, asked the scientists of this country, returned from Egypt where he completed his long study and after four decades of travel and work, he returned in his hometown. But the rarity and breadth of his knowledge scared his countrymen, they took him for a sorcerer and banished him. Constantine informed in time, fled and went to Salerno where he remained for some time hidden under the garb of a beggar. The brother of the king of Babylon who passes through this city, recognized him and presented him to the famous Robert Guiscard, who made him his first secretary.