Lincoln Castle

The Romans were the first to build a fort on this hilltop site. The Normans also built a castle on the site, initially as a wooden fort on a mound. The mound of the Lucy Tower was the original Norman motte, and it is now thought that the Norman bailey, or outer yard, was bigger than the current walled enclosure, following the line of the Roman settlement walls and enclosing the whole hilltop.
The massive earth ramparts and curtain wall are thought to have been built in the late 11th century. A stone keep, the Lucy Tower, was built on the original motte, and a second motte was constructed and topped by another stone tower, now known as the Observatory Tower.
The castle featured in several medieval battles and sieges, culminating in a siege in 1644 during the Civil War. After 1660, the castle ceased to be a military fortress, and instead was used as a gaol.
A prison built of brick was erected within the walls in the Georgian era, and partly replaced by a Victorian prison block behind.
The courthouse building within the walls dates from 1826, replacing an earlier building.
Visitors may be confused by the pricing structure: entry withing the curtain wall is free, the basic fee entitles you to go on the “Wall Walk”, and the premium fee in addition admits you to the Magna Carta exhibition, prison chapel and Victorian prison. If you are expecting a massive stone keep inside the walls, there isn’t one. There are also hourly free guided tours of the grounds.
There is plenty to see if you opt for the full ticket, and viewing the exhibits in the prison block can take some time. Lincoln Cathedral (admission fees may apply) is next to the castle.