Menander I Soter (Ancient Greek: Μένανδρος Σωτήρ, romanized: Ménandros Sōtḗr, lit. 'Menander the Saviour'; Pali: Milinda), sometimes called Menander the Great, was an Indo-Greek king (reigned c. 165/155 –130 BC) who administered a large territory in the northwestern regions of the Indian subcontinent and Central Asia. Menander is noted for having become a patron of Greco-Buddhism and is regarded as the greatest and most well-known of the Indo-Greek kings.
Menander might have initially been a prince or king of Bactria. After conquering the Punjab, as far as Taxila and Sagala, he established an empire which stretched from the Kabul River in the west to the Ravi River in the east, and from the Swat River valley in the north to Arachosia (the Helmand Province). The Greek geographer Strabo wrote that he "conquered more tribes than Alexander the Great." Ancient Indian writers indicate that he possibly launched expeditions southward into Rajputana (Rajasthan, Gujarat and Sindh) and central India (Gujarat and Malwa) and as far east down the Ganges River Valley as Pataliputra (Patna).
In ancient Greece, the term oecumene (UK) or ecumene (US; from Ancient Greek οἰκουμένη (oikouménē) 'the inhabited world') denoted the known, inhabited, or habitable world. In Greek antiquity, it referred to the portions of the world known to Hellenic geographers, subdivided into three continents: Africa, Europe, and Asia. Under the Roman Empire, it came to refer to civilization itself, as well as the secular and religious imperial administration.
In present usage, it is most often used in the context of "ecumenical" and describes the Christian Church as a unified whole, or the unified modern world civilization. It is also used in cartography to describe a type of world map (mappa mundi) used in late antiquity and the Middle Ages.
Megasthenes (/mɪˈɡæsθɪniːz/ mi-GAS-thi-neez; Ancient Greek: Μεγασθένης, died c. 290 BCE) was an ancient Greek historian, indologist, diplomat, ethnographer and explorer in the Hellenistic period. He described India in his book Indica, which is now lost, but has been partially reconstructed from literary fragments found in later authors that quoted his work. Megasthenes was the first person from the Western world to leave a written description of India.
Marinus of Tyre (Ancient Greek: Μαρῖνος ὁ Τύριος, Marînos ho Týrios; c. AD 70–130) was a geographer, cartographer and mathematician, who founded mathematical geography and provided the underpinnings of Claudius Ptolemy's influential Geography.
Pytheas of Massalia (/ˈpɪθiəs/; Ancient Greek: Πυθέας ὁ Μασσαλιώτης Pythéās ho Massaliōtēs; Latin: Pytheas Massiliensis; born c. 350 BC, fl. c. 320–306 BC) was a Greek geographer, explorer and astronomer from the Greek colony of Massalia (modern-day Marseille, France). He made a voyage of exploration to Northern Europe in about 325 BC, but his account of it, known widely in antiquity, has not survived and is now known only through the writings of others.
On this voyage, he circumnavigated and visited a considerable part of the British Isles. He was the first known Greek scientific visitor to see and describe the Arctic, polar ice, and the Celtic and Germanic tribes. He is also the first person on record to describe the midnight sun. The theoretical existence of some Northern phenomena that he described, such as a frigid zone, and temperate zones where the nights are very short in summer and the sun does not set at the summer solstice, was already known. Similarly, reports of a country of perpetual snow and darkness (the country of the Hyperboreans) had reached the Mediterranean some centuries before.