The military engineer Agostino Ramelli produced a remarkable illustrated book in 1588 describing a large number of machines that he devised. Called Le diverse et artificiose machine del Capitano Agostino Ramelli (The various and ingenious machines of Captain Agostino Ramelli), this work had a great impact in the field of mechanical engineering. The book contains 195 superb engravings of various machines along with detailed descriptions of each one in both French and Italian. The Dibner Library has original drawings of seven of the machines and this web site has been developed to further research on these artworks. We have on display here each of the drawings along with their counterparts in the printed book.