Greco-Roman in the context of "Hadrian"

Science in classical antiquity encompasses inquiries into the workings of the world or universe aimed at both practical goals (e.g., establishing a reliable calendar or determining how to cure a variety of illnesses) as well as more abstract investigations belonging to natural philosophy. Classical antiquity is traditionally defined as the period between the 8th century BC (beginning of Archaic Greece) and the 6th century AD (after which there was medieval science). It is typically limited geographically to the Greco-Roman West, Mediterranean basin, and Ancient Near East, thus excluding traditions of science in the ancient world in regions such as China and the Indian subcontinent.

Ideas regarding nature that were theorized during classical antiquity were not limited to science but included myths as well as religion. Those who are now considered as the first scientists may have thought of themselves as natural philosophers, as practitioners of a skilled profession (e.g., physicians), or as followers of a religious tradition (e.g., temple healers). Some of the more widely known figures active in this period include Hippocrates, Aristotle, Euclid, Archimedes, Hipparchus, Galen, and Ptolemy. Their contributions and commentaries spread throughout the Eastern, Islamic, and Latin worlds and contributed to the birth of modern science. Their works covered many different categories including mathematics, cosmology, medicine, and physics.

Claudius Ptolemy (/ˈtɒləmi/; Ancient Greek: Πτολεμαῖος, Ptolemaios; Latin: Claudius Ptolemaeus; c. 100 – 160s/170s AD), better known mononymously as Ptolemy, was a Greco-Roman mathematician, astronomer, astrologer, geographer, and music theorist who wrote about a dozen scientific treatises, three of which were important to later Byzantine, Islamic, and Western European science. The first was his astronomical treatise now known as the Almagest, originally entitled Mathēmatikḗ Syntaxis (Μαθηματικὴ Σύνταξις, Mathēmatikḗ Syntaxis, lit. 'Mathematical Treatise'). The second is the Geography, which is a thorough discussion on maps and the geographic knowledge of the Greco-Roman world. The third is the astrological treatise in which he attempted to adapt horoscopic astrology to the Aristotelian natural philosophy of his day. This is sometimes known as the Apotelesmatika (Αποτελεσματικά, 'On the Effects') but more commonly known as the Tetrábiblos (from the Koine Greek meaning 'four books'; Latin: Quadripartitum).

The Catholic Church promoted his work, which included the only mathematically sound geocentric model of the Solar System, and unlike most Greek mathematicians, Ptolemy's writings (foremost the Almagest) never ceased to be copied or commented upon, both in late antiquity and in the Middle Ages. However, it is likely that only a few truly mastered the mathematics necessary to understand his works, as evidenced particularly by the many abridged and watered-down introductions to Ptolemy's astronomy that were popular among the Arabs and Byzantines. His work on epicycles is now seen as a very complex theoretical model built in order to explain a false tenet based on faith.

Rhacotis (Egyptian: r-ꜥ-qd(y)t, Greek Ῥακῶτις; also romanized as Rhakotis) was the name for a city on the northern coast of Egypt at the site of Alexandria. Classical sources from the Greco-Roman era in both Ancient Greek and the Egyptian language suggest Rhacotis as an older name for Alexandria before the arrival of Alexander the Great.

Rhacotis was located west of the now-silted Canopic branch of the Nile. Unlike ports within the Nile Delta, it was reliably accessible to large ships, and enough water for a city could be supplied by a canal. It is also described as the home of sentinels who protected the Egyptian kingdom from outsiders.

The Arab conquest of Egypt, led by the army of Amr ibn al-As, under the Rashidun Caliphate took place between 639 and 642 AD. It ended the Roman period in Egypt which began in 30 BC and lasted for seven centuries, and more broadly, the Greco-Roman period which lasted for about a millennium.

Prior to the conquest, Byzantine rule in the country had been shaken, as Egypt had been conquered and occupied by the Sasanian Empire for a decade between 618–629, before being reconquered by the Byzantines under emperor Heraclius. The Caliphate took advantage of Byzantines' exhaustion to invade Egypt.

Aspendos or Aspendus (Attic: Ἄσπενδος; Pamphylian: Εστϝεδυς) was an ancient Greco-Roman city in Antalya province of Turkey. The site is located 40 km east of the modern city of Antalya.

It was situated on the Eurymedon River about 16 km inland from the Mediterranean Sea; it shared a border with, and was hostile to, the ancient city of Side.

In the history of economic thought, a school of economic thought is a group of economic thinkers who share or shared a mutual perspective on the way economies function. While economists do not always fit within particular schools, particularly in the modern era, classifying economists into schools of thought is common. Economic thought may be roughly divided into three phases: premodern (Greco-Roman, Indian, Persian, Islamic, and Imperial Chinese), early modern (mercantilist, physiocrats) and modern (beginning with Adam Smith and classical economics in the late 18th century, and Karl Marx and Friedrich Engels' Marxian economics in the mid 19th century). Systematic economic theory has been developed primarily since the beginning of what is termed the modern era.

Currently, the great majority of economists follow an approach referred to as mainstream economics (sometimes called 'orthodox economics'). Economists generally specialize into either macroeconomics, broadly on the general scope of the economy as a whole, or microeconomics, on specific markets or actors.