The best examples of concentric castles were built by Edward I, in North Wales. His shockingly expensive 'iron ring' of castles began in the 1290s, and many of the castles are near-perfect examples.

Who invented concentric castles?

Concentric castles appeared in Europe in the 13th century, with the castles built in Wales by Edward I providing some outstanding examples, in particular Beaumaris Castle, a "perfect concentric castle", albeit unfinished.

Who introduced concentric castles to England?

King Edward I built numerous concentric castles in the late 1200s to early 1300s, many of which can still be seen today.