A new era begins for an historical landmark which moves into the care of English Heritage after transfer was approved by Cumbria County Council.
Several archaeological digs have taken place at Birdoswald
Birdoswald Roman Fort, near Brampton, is set on Hadrian's Wall and is a popular tourist attraction.
At a special ceremony on Wednesday, a legionnaire in uniform will hand over a standard to mark the transfer.
Birdoswald was built in about 122AD to hold 1,000 soldiers and is one of the largest of 16 forts along the wall.
English Heritage is already responsible for most of the Hadrian's Wall World Heritage Site.
The popular fort attracted 35,000 visitors last year and overlooks the Irthing Gorge at Gisland.
County Councillor Roger Bingham said: "Birdoswald Fort is a wonderful historic site full of the county's Roman past.
"It is especially significant because it reveals more than its Roman past and we can see evidence of the Anglo Saxon hall, through to the medieval bastle houses... and Victorian villa."
Gordon Seabright, from English Heritage, said: "Birdoswald provides a fascinating insight into the history and development of Hadrian's Wall."