Italian High Renaissance Painter and Inventor, 1452-1519 Italian High Renaissance Painter and Inventor, 1452-1519 Florentine Renaissance man, genius, artist in all media, architect, military engineer. Possibly the most brilliantly creative man in European history, he advertised himself, first of all, as a military engineer. In a famous letter dated about 1481 to Ludovico Sforza, of which a copy survives in the Codice Atlantico in Milan, Leonardo asks for employment in that capacity. He had plans for bridges, very light and strong, and plans for destroying those of the enemy. He knew how to cut off water to besieged fortifications, and how to construct bridges, mantlets, scaling ladders, and other instruments. He designed cannon, very convenient and easy of transport, designed to fire small stones, almost in the manner of hail??grape- or case-shot (see ammunition, artillery). He offered cannon of very beautiful and useful shapes, quite different from those in common use and, where it is not possible to employ cannon ?? catapults, mangonels and trabocchi and other engines of wonderful efficacy not in general use. And he said he made armoured cars, safe and unassailable, which will enter the serried ranks of the enemy with their artillery ?? and behind them the infantry will be able to follow quite unharmed, and without any opposition. He also offered to design ships which can resist the fire of all the heaviest cannon, and powder and smoke. The large number of surviving drawings and notes on military art show that Leonardo claims were not without foundation, although most date from after the Sforza letter. Most of the drawings, including giant crossbows (see bows), appear to be improvements on existing machines rather than new inventions. One exception is the drawing of a tank dating from 1485-8 now in the British Museum??a flattened cone, propelled from inside by crankshafts, firing guns. Another design in the British Museum, for a machine with scythes revolving in the horizontal plane, dismembering bodies as it goes, is gruesomely fanciful. Most of the other drawings are in the Codice Atlantico in Milan but some are in the Royal Libraries at Windsor and Turin, in Venice, or the Louvre and the École des Beaux Arts in Paris. Two ingenious machines for continuously firing arrows, machine-gun style, powered by a treadmill are shown in the Codice Atlantico. A number of other sketches of bridges, water pumps, and canals could be for military or civil purposes: dual use technology. Leonardo lived at a time when the first artillery fortifications were appearing and the Codice Atlantico contains sketches of ingenious fortifications combining bastions, round towers, and truncated cones. Models constructed from the drawings and photographed in Calvi works reveal forts which would have looked strikingly modern in the 19th century, and might even feature in science fiction films today. On 18 August 1502 Cesare Borgia appointed Leonardo as his Military Engineer General, although no known building by Leonardo exists. Leonardo was also fascinated by flight. Thirteen pages with drawings for man-powered aeroplanes survive and there is one design for a helicoidal helicopter. Leonardo later realized the inadequacy of the power a man could generate and turned his attention to aerofoils. Had his enormous abilities been concentrated on one thing, he might have invented the modern glider.   Related Paintings of LEONARDO da Vinci :. | St John in the Wilderness | Funf studies of grotesque faces | The Madonna of the Carnation (detail) sg | Study of the proportion of horses | Ceiling decoration yy |
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Ferdinand bol
Dutch Baroque Era Painter, 1616-1680 Dutch painter and draughtsman. He was a pupil and prominent follower of Rembrandt in Amsterdam. His reputation and fame are based on his history paintings, which, though successful at the time,
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Jacquemart de Hesdin
French Gothic Era Miniaturist, ca.1350-1410 Jacquemart's whole career developed at Bourges (the capital of the Province of Berry) at the court of John, Duke of Berry. He was active in the Duke's service from 1384 until 1414 and made a significant contribution to the Duke's famous illuminated books, in particular the Tr??s Belles Heures du Duc de Berry, the Grandes Heures, the Petites Heures, and a Psalter, often working with the Limbourg brothers and the painter known as the Boucicaut Master. On 28 November 1384, Jacquemart was paid for the first time by the steward of John, Duke of Berry, to cover expenses he and his wife had incurred in Bourges, and he was also paid for his clothes for the coming winter. After 1384, he was paid a regular salary. In 1398, while Jacquemart was working for Berry in the castle at Poitiers, he was accused with his assistant Godefroy and with his brother-in-law Jean Petit of the theft of colours and patterns from Jean de Hollande, another painter who worked for Berry. Jacquemart is recorded as staying in Bourges in 1399. The Tr??s Belles Heures du Duc de Berry (also sometimes called the Brussels Hours, from the city where it has long been kept) is chiefly the work of Jacquemart. The book is described in an inventory of Berry's library dated 1402: ?? Unes tr??s belles heures richement enlumin??es et ystori??es de la main Jacquemart de Odin. ?? The Tr??s Belles Heures disappeared for several hundred years, but the scholarly consensus is that the manuscript in the Biblioth??que Royale at Brussels is the one described in the 1402 inventory. The Petites Heures is believed to date from before 1388, apart from a miniature of the Duke of Berry himself added later by the Limbourg brothers. Millard Meiss suggests that at least five painters worked on the book's illuminations, Jacquemart and four unidentified artists. One of these four is commonly referred to as the Pseudo-Jacquemart. Jacquemart's small painting The Carrying of the Cross (vellum mounted on canvas, 38 cm by 28 cm, dated before 1409) is in the Mus??e du Louvre.