BASTIONS and CURFEW TOWERS
“There are few points in the ancient jurisprudence of England which are enveloped in more doubt and obscurity, or which have given rise to more conflicting opinions its to their origin and intention than the couvre-feu law. Some have regarded it as a cruel devise of our first William the Conqueror to coerce and enslave his newly acquired Saxon subjects; whilst others have seen in it a wise and thoughtful provision for the prevention of fires, and have endeavoured to trace its nativity to an age antecedent to the Norman conquest. Although there is no evidence to show that the couvre-feu law originated with the Norman conqueror, yet it appears certain that in the year 1068 he ordained that all people should put out their fires and lights at the eight o’clock bell, and go to bed.”
curfew, couvre-feu, curphour, ignitegium, peritegium, carre-feu, cerre-feu
protect or prevent; from deeds incendiary or insurgent
from: Journal of the British Archaeological Association

LA CLOCHE DE COUVRE-FEU
the curfew cloche also the curfew cloche tower
” But it is time to allude to the instrument by which the fires were extinguished — the couvre-feu. This utensil is called a curfew, or couvre-feu, from its use, which is that of suddenly putting out a fire. This curfew [cloche, dome, cupola] is of copper, riveted together, as solder would have been liable to melt with the heat.’

bastion · citadel · fort · castle · redoubt · alcazar
embankment · buttress · turret · rampart · bunker
hold · fastness · burg · tower · donjon · peel
garrison · keep · fortalice · bartizan · fortress
bulwark · stronghold · barbican · fortification
acropolis · battlement · stockade · blockhouse
BASTION