Although the area of Dublin Bay has been inhabited by humans since prehistoric times, the writings of Ptolemy ( the Egyptian astronomer and cartographer ) in about 140 AD provide possibly the earliest reference to a settlement there.

140 — Ptolemy completes his Almagest, which contains a catalog of stars, observations of planetary motions, and treatises on geometry and cosmology

Eblana is the name of an ancient Irish settlement which appears in the Geographia of Claudius Ptolemaeus ( Ptolemy ), the Greek astronomer and cartographer, around the year 140 AD.

The earliest reference to Dublin is sometimes said to be seen in the writings of Claudius Ptolemaeus ( Ptolemy ), the Egyptian-Greek astronomer and cartographer, around the year A. D. 140, who refers to a settlement called Eblana.

Probably the earliest mention of them, under the name Καρπιανοί ( Carpiani in Latin ) is in the Geographia of the 2nd-century Greek geographer Ptolemy, composed c. AD 140.

*# The east coast of the sea was definitely attached to Galilee in AD 84, and Ptolemy ( circa 140 ) places Julius in Galilee.

Sixty of Menelaus's ships that had escaped from the harbor of Salamis were now in Kition, and these vessels were added to the 140 triremes and pentireis and 200 military transport ships of Ptolemy.

* Ptolemy X born ca 140 or 139 BC.

It was one of the 48 constellations listed by the 2nd century AD astronomer Ptolemy, and it remains one of the 88 modern constellations.

In the 2nd century AD, Claudius Ptolemy catalogued 37 stars in Centaurus.

In the 2nd century AD, Ptolemy produced his treatise on cartography, Geographia.

* Claudius Ptolemy 83 – c. 168 AD, Roman Empire ( Roman Egypt )

By AD 139, the geographer Ptolemy writes that the " Huni " ( Χοῦνοι or Χουνοἰ ) are between the Bastarnae and the Roxolani in the Pontic area under the rule of Suni.

Another of the most famous of the early physicists was Ptolemy ( 90 AD-168 AD ), one of the leading minds during the time of the Roman Empire.

Reconstruction of Ptolemy | Ptolemy's map ( 2nd century AD ) of Aria ( satrapy ) | Aria ( Herāt ) and neighbouring states by the 15th century German people | German cartographer Nicolaus Germanus

Writing about 80 years later, in 140-150 AD, Ptolemy, drawing on the earlier naval expeditions of Agricola, also distinguished between the Ebudes, of which he writes there were only five ( and thus possibly meaning the Inner Hebrides ) and Dumna.

In the second century AD the satirist Lucian wrote that Sostratus inscribed his name under plaster bearing the name of Ptolemy.

:: A. Ptolemy, King of Mauretania, 1 BC – 40 AD, had 1 child

Claudius Ptolemy (;, Klaudios Ptolemaios ; ; AD 90 – AD 168 ) was a Greek-Roman citizen of Egypt who wrote in Greek.

The Hellenistic astronomers Hipparchus ( c. 150 BC ) and Ptolemy ( c. AD 150 ) subdivided the day sexagesimally and also used a mean hour, simple fractions of an hour (,, etc.

In the 2nd century, Ptolemy ( c. 90-c. 186 AD ) of Roman Egypt published a star catalogue as part of his Almagest, which listed 1, 022 stars visible from Alexandria.

Ursa Major was one of the 48 constellations listed by the 2nd century AD astronomer Ptolemy.

Ptolemy lived in the 2nd century AD, three centuries after the discovery of the precession of the equinoxes by Hipparchus around 130 BC, but he ignored the problem by dropping the concept of a fixed celestial sphere and adopting what is referred to as a tropical coordinate system instead.

Some modern scholars have also compared his work in astronomy to that of Ptolemy ( AD 86 – 161 ).

** Ptolemy of Mauretania, client king of Mauretania ( d. AD 40 )

Ptolemy ( c. AD 90 – c. AD 168 ) stated " We consider it a good principle to explain the phenomena by the simplest hypothesis possible ",.

His ideas were later expanded by Ptolemy ( 1st century AD ), who believed that the Indian Ocean was enclosed on the south by land, and that the lands of the Northern Hemisphere should be balanced by land in the south.

Ancient Greek astronomer Ptolemy in 150 AD believed that the Earth was the center of the solar system but still used the terms retrograde and prograde to describe the movement of the planets in relation to the stars.

* Ptolemy of Mauretania ( d. AD 40 )

Claudius Ptolemy ( c. AD 130-170 ), the father of classical astrology, almost completely ignored houses ( Templa as Manlius calls them ) in his astrological text, Tetrabiblos.

Ptolemy, who must come the closest to representing indigenous names, lists the Lochra River just south of a feature he calls the " sandy shore " on the southwest coast.

As well as the Damnonii, Ptolemy lists the Otalini, whose capital appears to have been Traprain Law ; to their west, the Selgovae in the Southern Uplands and, further west in Galloway, the Novantae.

It was not the capital of a civitas, though Ptolemy lists it as one of the cities of the Cantiaci.

Ptolemy lists the declination of 18 stars as recorded by Timocharis or Aristillus in roughly the year 290 BCE.

1241 bears some signs of confusion since it lists Apollonius under Ptolemy I Soter ( died 283 BC ), or Ptolemy V Epiphanes ( born 210 BC ).

Significant Celtic elements survived there into the 2nd century AD: Ptolemy ( III. 8. 3 ) lists two Celtic peoples, the Taurisci and Anartes, as resident in the northernmost part of Dacia, in the northern Carpathians.

The 2nd century geographer Claudius Ptolemy lists the Agathyrsi among the tribes in ' European Sarmatia ', between the Vistula and the Black Sea

Ptolemy lists the Brigantes also as a tribe in Ireland, where they could be found around Wexford, Kilkenny and Waterford while another probably Celtic tribe named Brigantii is mentioned by Strabo as a sub-tribe of the Vindelici in the region of the Alps.

The star catalogue compiled by Claudius Ptolemy in the 2nd century CE lists 1, 022 fixed stars visible from Alexandria.

Ptolemy, writing in the 2nd century AD, gives only brief mention of the Vangiones in his lists of towns and peoples.

Ptolemy lists a huge number of cities, tribes, and sites and places them in the world.

Ptolemy does not list a Πολις for the Epidii, but the Ravenna Cosmography ( RC 108. 4 ) lists Rauatonium, assumed to be Southend, Kintyre.

Their capital was Pallantia ( either Palencia or Palenzuella ) and Ptolemy lists in their territory some twenty towns or Civitates, including Helmantica / Salmantica ( Salamanca ), Arbucala ( Zamora ), Pincia or Pintia ( Padilla de Duero – Valladolid ), Intercantia ( Paredes de Nava – Palencia ), Cauca ( Coca – Segovia ), Septimanca ( Simancas ), Rauda ( Roa ), Dessobriga ( Oserna ) and Autraca or Austraca – located at the banks of the river Autra ( Odra ), seized from the Autrigones in the late fourth Century BC – to name but a few.