Lancaster is a medieval (gothic) castle. Many castles in Great Britain were built on places of original Roman fortresses.
The Dunstanburgh Castle was built to be a fortress. The building of the castle was commissioned by Earl Thomas of Lancaster in 1313.
John of Gaunt lived in Halton Castle for much of his life as the Duke of Lancaster, but retired to Leiceter Castle and died there.
Lancaster
concentric castle
its a concentric castle
A stone castle
A motte and bailey castle
concentric
Langley Castle is a medieval Tower House.
none that was the last castle :)
Kilkenny castle is both medieval and modern.
The current keep of Blarney Castle is a mid-fifteenth century mediaeval castle. It was built on the site of earlier fortifications which date back as far as the end of the 12th Century. It was built during the reign of the House of Lancaster during a period when Irish Chieftains were becoming more and more similar to the Anglo-Irish Lords.