Note 081
On the fortifications, engines, and sieges of the middle ages, see Muratori, (Antiquitat. Italiae, tom. ii. dissert. xxvi. p. 452 - 524.) The belfredus, from whence our belfrey, was the movable tower of the ancients, (Ducange, tom. i. p. 608.)

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The History Of The Decline And Fall Of The Roman Empire —Fall In The East —Chapter 58