Built in the 2nd century

Roman city: triumphal arch and hippodrome

Absorbed by Rome in 46AD and "enjoyed its greatest prosperity in the 2nd and 3rd centuries. This was the period which saw the construction of grandiose monuments" (AB)

For its 2nd century Roman theatre

"Dougga is the best preserved Roman small town in North Africa" - the Roman theatre dates from 168 or 169 CE, and is among the earliest of the major remaining Roman structures that mostly date from the 3rd century

The Imperial residence was built over it in two stages, 118-25 and 125-38. (AB ev)

founded around 100

Over 166 years starting in 106 CE, the Romans extracted some 500 tonnes of gold from the site (AB ev)

Hadrian's Wall - Construction commenced in AD122 Antonine Wall from AD 142 onwards. The inscribed sections of the German Limes were also 2nd century - this period was the apogee of the territorial expansion of the Roman Empire

The nominated buildings were initially constructed over a span of eighteen centuries between 118 AD and the 20th century. The Tishi, Shaoshi and Qimu Gates have survived since Han times

The Dacian Frontier was part of the Roman Frontiers from 106 to 271 CE. (AB ev)

"Djémila is an outstanding example of ... (an) architectural ensemble illustrating a significant stage in Roman history of North Africa, from the 2nd to the 6th centuries". (It)is an " ancient Roman colony founded during the reign of Nerva (96 - 98 A.D.)".Around the beginning of the 3rd century, it expanded beyond its ramparts with the creation of the Septimius Severus Temple, the Arch of Caracalla, the market and the civil basilica." (AB)