Assertion: castle's design | /r/HasProperty | concentric
Facets:
Source sentences:
text: Castles such as Dover and the Tower of London were expanded in a concentric design in what Cathcart King has labelled the early development of "scientific fortification".
text: The largest medieval castle in Wales, Caerphilly was built with a concentric design by Gilbert de Clare (1243-1295 CE) as a robust defence against Welsh attacks.