Posidonius in the context of "Syria"

The earliest known world maps date to classical antiquity, the oldest examples of the 6th to 5th centuries BCE still based on the flat Earth paradigm. World maps assuming a spherical Earth first appear in the Hellenistic period. The developments of Greek geography during this time, notably by Eratosthenes and Posidonius culminated in the Roman era, with Ptolemy's world map (2nd century CE), which would remain authoritative throughout the Middle Ages. Since Ptolemy, knowledge of the approximate size of the Earth allowed cartographers to estimate the extent of their geographical knowledge, and to indicate parts of the planet known to exist but not yet explored as terra incognita.

With the Age of Discovery, during the 15th to 18th centuries, world maps became increasingly accurate; exploration of Antarctica, Australia, and the interior of Africa by western mapmakers was left to the 19th and early 20th century.

The Archimedes' screw, also known as the Archimedean screw, hydrodynamic screw, water screw or Egyptian screw, is one of the earliest documented hydraulic machines. It is a reversible hydraulic machine that can be operated both as a pump or a power generator.

The origins of the water screw are unknown; Archimedes of Syracuse is traditionally credited with inventing the water screw, but other academics argue Archimedes found the Egyptians already using the screw. Moschion between 250–220 BC details the screw used as a bilge pump in a ship, with Posidonius reporting that the water screw was used for drainage in Spanish mines. Archaeological remains of the screw in Europe and Asia suggested that screw was diffused across the territories of the Roman Empire, though it fell out of use in the third century BC.

The Helvetii (Ancient Greek: Ἐλουήτιοι, Latin: Helvētiī [hɛɫˈweːti.iː], Gaulish: *Heluētī), anglicized as Helvetians, were a Celtic tribe or tribal confederation occupying most of the Swiss plateau at the time of their contact with the Roman Republic in the 1st century BC. According to Julius Caesar, the Helvetians were divided into four subgroups or pagi. Of these, Caesar names only the Verbigeni and the Tigurini, while Posidonius mentions the Tigurini and the Tougeni (Τωυγενοί). They feature prominently in the Commentaries on the Gallic War, with their failed migration attempt to southwestern Gaul (58 BC) serving as a catalyst for Caesar's conquest of Gaul.

The Helvetians were subjugated after 52 BC, and under Augustus, Celtic oppida, such as Vindonissa or Basilea, were re-purposed as garrisons. In AD 68, a Helvetian uprising was crushed by Aulus Caecina Alienus.The Swiss plateau was at first incorporated into the Roman province of Gallia Belgica (22 BC), later into Germania Superior (AD 83).The Helvetians, like the rest of Gaul, were largely Romanized by the 2nd century. In the later 3rd century, Roman control over the region waned, and the Swiss plateau was exposed to the invading Alemanni. The Alemanni and Burgundians established permanent settlements in the Swiss plateau in the 5th and 6th centuries, resulting in the early medieval territories of Alemannia (Swabia) and Upper Burgundy. The Helvetii were largely assimilated by their new rulers, contributing to the ethnogenesis of modern Swiss people.

Bibliotheca Historica (Latin; Greek: Βιβλιοθήκη Ἱστορική, Bibliothḗkē Historikḗ), also known as the Historical Library or Library of History, is a work of universal history by Diodorus Siculus. It consisted of forty books, which were divided into three sections. The first six books are geographical in theme and describe the history and culture of Egypt (Book I), of Mesopotamia, India, Scythia, and Arabia (II), of North Africa (III), and of Greece and Europe (IV–VI). In the next ten books, he recounts human history starting with the Trojan War (Book VII) down to the death of Alexander the Great (XVII). The final section concerns the historical events from the successors of Alexander (Book XVIII) down to the time of the First Triumvirate of the late Roman Republic (XL). The end of the work has been lost, and it is unclear whether Diodorus actually reached the beginning of Caesar's Gallic War in 59 BC (as he promises at the beginning of the work) or, as evidence suggests, he stopped short at 60 BC owing to old age and weariness from his labors. He selected the name "Library" as an acknowledgement that he was assembling a composite work drawing from many sources. Of the authors he used, some who have been identified include Hecataeus of Abdera, Ctesias of Cnidus, Ephorus, Theopompus, Hieronymus of Cardia, Duris of Samos, Diyllus, Philistus, Timaeus, Polybius, and Posidonius.

Diodorus's immense work has not survived intact. Only Books I–V and Books XI–XX remain in their entirety. The rest exists only in fragments preserved in Photius and in the Excerpta of Constantine Porphyrogenitus.