Hadrian (Latin: Publius Aelius Hadrianus Augustus, January 24, 76 – July 10,138) was Roman emperor from 117 to 138 AD. Hadrian is known for building Hadrian's Wall, which marked the northern limit of Britannia.

Hadrian's Wall (Latin: Vallum Aelium), also called the Roman Wall or Vallum Hadriani in Latin, was a defensive fortification in the Roman province of Britannia, begun in 122 AD in the reign of the emperor Hadrian. It ran from the banks of the River Tyne near the North Sea to the Solway Firth on the Irish Sea, and was the northern limit of the Roman Empire.

Today, in 2016, a significant portion of the wall still stands and can be followed on foot along the adjoining Hadrian's Wall Path. It is the most popular tourist attraction in Northern England and was designated as a UNESCO World Heritage Site in 1987.

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