Principia: Did you mean...?

The legionary base at Lambaesis in modern-day Algeria was founded shortly before Hadrian's (r. 117-138 CE) visit to the North African provinces in 128 CE. It was the camp of the third legion (Legio III Augusta). The camp covered an area of...

The personal copy of Isaac Newton's (1642-1727) own work Principia in which he outlines his three laws of motion and universal law of gravity. (Wren Library, Trinity College, Cambridge)

The Roman army constructed both temporary and permanent forts and fortified military camps (castrum) across the frontiers of the empire's borders and within territories which required a permanent military presence to prevent indigenous uprisings...

In the 2nd century CE, the Roman Empire stretched from Scotland in northern Europe to the deserts of southern Egypt, encompassing the entirety of the Mediterranean basin. Beyond that lay its borders. Where there was no natural frontier such...

Isaac Newton (1642-1727) was an English mathematician and physicist widely regarded as the single most important figure in the Scientific Revolution for his three laws of motion and universal law of gravity. Newton's laws became a fundamental...

The 1,900th anniversary of the visit of the Roman emperor Hadrian (r. 117-138 CE) to Britain and the construction of the wall that bears his name will be observed in 2022. A year-long festival will be held, filled with hundreds of events...

The Enlightenment (Age of Reason) was a revolution in thought in Europe and North America from the late 17th century to the late 18th century. The Enlightenment involved new approaches in philosophy, science, and politics. Above all, the...

Edmond Halley (1656-1742) was an English astronomer, mathematician, and cartographer. Halley's Comet is named after him since he accurately predicted its return in 1758. One of the early globetrotting scientists, Halley led several maritime...

Eris is the Greek goddess and personification of discord and strife. She is an unpopular figure in Greek mythology due to her problematic behaviour and her ability to stir up trouble wherever she goes. Eris is most famous for her Golden Apple...

James II of England (r. 1685-1688) reigned briefly as the king of England, Scotland, and Ireland until he was deposed by the Glorious Revolution of November 1688. James, also known as James VII of Scotland, was the fourth Stuart monarch...