Jane Eyre vocabulary

The waved face of the inner or main wall of the castle, giving a divergent fire over the front, is an interesting feature in advance of the time. So also is the masonry protection of the machicolation at the top of the donjon, a protection which at that time was usually given by wooden hoardings.

1911 Encyclopedia Britannica (A-I)

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It lies low, on the banks of the Loing [...]. It is dirty, not very healthy, and exceedingly picturesque. Its bridge, church, gates and donjon have been painted and sketched by millions of artists, professional and amateur.

Arnold Bennett. Paris Nights and Other Impressions of Places and People (1913)

The grete tour, that was to thikke and strong,

Which of the castel was the chief dongeoun,

Theras the knightes weren in prisoun

Of which I tolde yow and tellen shal,

Chaucer. The Canterbury Tales: The Knight's Tale