**“A mine of information” on the surprising technological advances made in the Middle Ages, from the authors of *Life in a Medieval City* ( *Kirkus Reviews* ).** “In their latest medieval study, the Gieses explode the myth that the Middle Ages were unconcerned with the empirical and demonstrate that the Renaissance itself was the outcome of gradual progress made over the previous thousand years . . . They describe the above-ground reduction furnace that was feeding iron to local forges where smiths shaped it into parts for the new heavy ploughs, spades, and shoes for horses now beginning to pull with the aid of the padded collar; the triangular lateen sail that could drive Viking ships to trading posts on the Volga; and the considerable extension of the use of the waterwheel. The Gieses work century by century through the Middle Ages (from 500 to 1500), listing new tools and methods, each page full of attractive detail and anecdote. An important chapter is devoted to the influence of China, via the Silk Road, and Islam. We also learn how cities developed from fortresses into centers of commerce and watch the growth of handicrafts, gothic architecture, universities, mass production, the printing press and more.” — *Kirkus Reviews* “The flame of human ingenuity burned with surprising intensity during the medieval centuries . . . the Gieses here explode the myth of the Dark Ages, showing that the Fall of Rome did not plunge Europe into stagnation and lethargy.” — *Booklist* *Includes photographs*