Context: The Six Enneads, sometimes abbreviated to The Enneads or Enneads, is the collection of writings of Plotinus, edited and compiled by his student Porphyry (c. 270 AD). Plotinus was a student of Ammonius Saccas and they were founders of Neoplatonism. His work, through Augustine of Hippo, the Cappadocian Fathers, Pseudo-Dionysius the Areopagite and several subsequent Christian and Muslim thinkers, has greatly influenced Western and Near-Eastern thought., The Cappadocian Fathers, also traditionally known as the Three Cappadocians, are Basil the Great (330379), who was bishop of Caesarea; Basil's younger brother Gregory of Nyssa (c.332395), who was bishop of Nyssa; and a close friend, Gregory of Nazianzus (329389), who became Patriarch of Constantinople. The Cappadocia region, in modern-day Turkey, was an early site of Christian activity, with several missions by Paul in this region., Alexandria (or ; Arabic: '; '; "") is the second largest city and a major economic centre in Egypt, extending about along the coast of the Mediterranean Sea in the north central part of the country. Its low elevation on the Nile delta makes it highly vulnerable to rising sea levels. Alexandria is Egypt's largest seaport, serving approximately 80% of Egypt's imports and exports. It is an important industrial center because of its natural gas and oil pipelines from Suez. Alexandria is also an important tourist destination., Plotinus ( 204/5  270) was a major Greek-speaking philosopher of the ancient world. In his philosophy there are three principles: the One, the Intellect, and the Soul. His teacher was Ammonius Saccas and he is of the Platonic tradition. Historians of the 19th century invented the term Neoplatonism and applied it to him and his philosophy which was influential in Late Antiquity. Much of the biographical information about Plotinus comes from Porphyry's preface to his edition of Plotinus' "Enneads". His metaphysical writings have inspired centuries of Pagan, Christian, Islamic and Gnostic metaphysicians and mystics., Ammonius Saccas (fl. 3rd century AD) was a Greek philosopher from Alexandria who was often referred to as one of the founders of Neoplatonism. He is mainly known as the teacher of Plotinus, whom he taught for eleven years from 232 to 243. He was undoubtedly the biggest influence on Plotinus in his development of Neoplatonism, although little is known about his own philosophical views. Later Christian writers stated that Ammonius was a Christian, but it is now generally assumed that there was a different Ammonius of Alexandria who wrote biblical texts., Augustine of Hippo (13 November 354  28 August 430) was an early Christian theologian and philosopher whose writings influenced the development of Western Christianity and Western philosophy. He was the bishop of Hippo Regius (within modern-day Annaba, Algeria), located in Numidia (Roman province of Africa). Augustine is viewed as one of the most important Church Fathers in Western Christianity for his writings in the Patristic Era. Among his most important works are "The City of God" and "Confessions.", A teacher (also called a school teacher or, in some contexts, an educator) is a person who helps others to acquire knowledge, competences or values., Late Antiquity is a periodization used by historians to describe the time of transition from classical antiquity to the Middle Ages in mainland Europe, the Mediterranean world, and the Middle East. The development of the periodization has generally been accredited to historian Peter Brown, after the publication of his seminal work "The World of Late Antiquity" (1971). Precise boundaries for the period are a continuing matter of debate, but Brown proposes a period between the 3rd and 8th centuries AD. Generally, it can be thought of as from the end of the Roman Empire's Crisis of the Third Century (c. 235  284) to, in the East, the early Islamic period (7th9th centuries), following the Muslim conquests in the mid7th century. In the West the end was earlier, with the start of the Early Medieval period typically placed in the 6th century, or earlier on the Western edges of the empire., Geometry (from the ; "geo-" "earth", "-metron" "measurement") is a branch of mathematics concerned with questions of shape, size, relative position of figures, and the properties of space. A mathematician who works in the field of geometry is called a geometer., Neoplatonism is a modern term used to designate a tradition of philosophy that arose in the 3rd century AD and persisted until shortly after the closing of the Platonic Academy in Athens in AD 529 by Justinian I. Neoplatonists were heavily influenced by Plato, but also by the Platonic tradition that thrived during the six centuries which separated the first of the Neoplatonists from Plato., Euclid ("Eukleids" ; fl. 300 BCE), sometimes called Euclid of Alexandria to distinguish him from Euclides of Megara, was a Greek mathematician, often referred to as the "father of geometry". He was active in Alexandria during the reign of Ptolemy I (323283 BCE). His "Elements" is one of the most influential works in the history of mathematics, serving as the main textbook for teaching mathematics (especially geometry) from the time of its publication until the late 19th or early 20th century. In the "Elements", Euclid deduced the principles of what is now called Euclidean geometry from a small set of axioms. Euclid also wrote works on perspective, conic sections, spherical geometry, number theory and rigor., Plato (Greek: "Plátn", in Classical Attic; 428/427 or 424/423  348/347 BCE) was a philosopher in Classical Greece and the founder of the Academy in Athens, the first institution of higher learning in the Western world. He is widely considered the most pivotal figure in the development of philosophy, especially the Western tradition. Unlike nearly all of his philosophical contemporaries, Plato's entire "œuvre" is believed to have survived intact for over 2,400 years., Porphyry of Tyre ( / prfri / ; Greek :  , Porphyrios ; c. 234 -- c. 305 AD ) was a Neoplatonic philosopher who was born in Tyre . He edited and published the Enneads , the only collection of the work of his teacher Plotinus . His commentary on Euclid 's Elements was used as a source by Pappus of Alexandria . He also wrote many works himself on a wide variety of topics . His Isagoge , or Introduction , is an introduction to logic and philosophy , and in Latin translation it was the standard textbook on logic throughout the Middle Ages . In addition , through several of his works , most notably Philosophy from Oracles and Against the Christians , which was banned by emperor Constantine the Great , he was involved in a controversy with a number of early Christians , ., Pappus of Alexandria (c. 290  c. 350 AD) was one of the last great Alexandrian mathematicians of Antiquity, known for his "Synagoge" () or "Collection" (c. 340), and for Pappus's hexagon theorem in projective geometry. Nothing is known of his life, other than, (from his own writings) that he had a son named Hermodorus, and was a teacher in Alexandria., Subject: porphyry , Relation: country_of_citizenship, Options: (A) algeria (B) athens (C) earth (D) egypt (E) greece (F) megara (G) roman empire (H) teacher (I) turkey
Output: roman empire