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A turret on the Wall is demolished to make way for Chesters fort, one of 15 built along Hadrian's Wall.
A 500-man cavalry unit, the 'ala Augusta ob virtutem appellata', is stationed at the fort.
Find out more about the history of Chesters Roman Fort
The 1st cohort of Dalmatians, an infantry unit, carries out building works. For the first time in its history, Chesters may have temporarily ceased to be a cavalry fort.
The Second Asturians ('ala II Asturum'), a cavalry unit from northern Spain, settle here and completely rebuild the barracks.
Outside the fort walls, civilian settlements (vici) grow and prosper.
The Chesters unit adopts compulsory hereditary service and soldiers are mainly paid in kind. The outer settlements are probably abandoned.
The Second Asturians remain at Chesters, increasingly cut off from the weakening Roman Empire.
Saxon builders dismantle the remains of the Roman bridge, using the stone for a church at Hexham.
Find out more about the Roman bridge at Chesters
Nathaniel Clayton buys the estate, levelling the ruins and grassing them over to form a park.
Nathaniel's son John Clayton, a lawyer and Roman enthusiast, inherits the property.
Clayton devotes every Monday to excavations. Chief workmen are William Tailford and his son, who spends 45 years excavating Chesters.
After John Clayton's death, his son Nathaniel takes over the excavations and builds a museum to house his father's Roman finds.
See highlights of the collection at Chesters
The eastern bridge abutment, fort, wall and baths to the east are taken over by the Ministry of Works.
Excavation and surveys take place on the eastern and western bridge abutments, the only large-scale work of this type completed after the Claytons.
Learn more about the history of Chesters Roman Fort