mise à jour - (mettre) bring to light (also bring up to date)
vestiges, m. - remains
forteresse, f. - fortress
au Moyen Age - in the Middle Ages
invasion, f. - invasion
fleuve, m. - river
ordonner - to command (commander - to order, people, merchandise)
royaume, m. - realm
donjon, m. - prison
abriter - to shelter
trésor, m. - treasure
prisonniers de haut rang - high ranking prisoners
regne, m. - reign
embellir - to make more beautiful
aîle, f. - wing (of bird or building)
bâti - (adj. from bâtir) built
génie, m. - genius
déployé - (adj. from déployer) displayed (military : deployed)
aménager - to move in
tournoi, m. - tournament (jousting in this case)
veuve, f. - widow
massacrer - to massacre
Saint Barthelémy - St. Barthelemy
d'assasinats et de bals - of assassinations and balls (note the liaison after assasinats, which is rare, after a plural noun. This narrator uses all of the optional -facultative- liaisons : after conjugated verbs, after mais, pas, etc.)