* Built by: Emperor Hadrian
* Location: Northern England, between the Solway Firth and the mouth of the River Tyne
* Length: 73 miles (118 kilometers)
* Height: 15 feet (4.5 meters)
* Width: 8 feet (2.4 meters)
* Materials: Stone, turf, and wood
Hadrian's Wall was built as part of the Roman Empire's defense system in Britain. It was constructed between 122 and 128 AD, during the reign of Emperor Hadrian. The wall was designed to keep out the Picts, a group of Celtic tribes who lived in what is now Scotland.
The wall was a massive undertaking. It was built by a team of 15,000 soldiers and took six years to complete. The wall was constructed of stone, turf, and wood. It was 15 feet high and 8 feet wide, and it stretched for 73 miles across the width of Britain.
The wall was not just a physical barrier. It was also a symbol of Roman power and authority. The wall showed the Picts that the Romans were determined to defend their territory. It also helped to control trade and migration between Britain and Scotland.
Hadrian's Wall is one of the most iconic landmarks in Britain. It is a UNESCO World Heritage Site and is a popular tourist destination. The wall is a reminder of the Roman Empire's power and influence, and it is a symbol of the long and complex history of Britain.