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 :. | Madonna in the rock grottos | The Refectory with the Last Supper after restoration g | Lady with Ermine | Raffaello Sanzio named Raffael Portrat of Lorenzo de Medici | The Madonna of the Carnation (detail) sg |
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Jan Frans van Douven
Jan Frans van Douven, or Johan Francois Douven, (Roermond, 2 March 1656 - Desseldorf, 1727) was a Southern Netherlandish portrait painter belonging to the Dutch Leyden School. Born in Roermond, he spent most of his life as Court painter in Desseldorf, now in Germany, where he created most of his worksDate circa 1695(1695) Medium oil
Evert Collier
(c. 1640 - few days before September 8, 1708) was a Dutch painter known for vanitas still-life and trompe l'oeil paintings. His first name is sometimes spelled "Edward" or "Edwaert" or "Eduwaert" or "Edwart," and his last name is sometimes spelled "Colyer" or "Kollier". Evert Collier was born between 1630 and 1650 in Breda, Noord-Brabant, and died in 1708. He is believed to have trained in Haarlem, as his earliest paintings show the influence of Pieter Claesz and Vincent Laurensz van der Vinne. By 1667, he had moved to Leiden, where he became a member of the Guild of St. Luke in 1673. He moved to Amsterdam by 1686 and to London in 1693. He was buried September 8, 1708 at St. James's, Piccadilly.
Abraham jansz.begeyn
Dutch painter and draughtsman , 1637-1697 was a Dutch painter of landscapes and cattle in the manner of Nicolaes Pietersz Berchem. Begeyn's earliest known work is from 1653. In 1655 he joined the painter's guild of Leiden, where he staid until at least 1667. He was then active in Amsterdam and The Hague, before he took his residence in Berlin in 1688. There his works were greatly prized, and, according to Houbraken, he was principal painter to Frederick III, the elector of Brandenburg, afterwards king of Prussia. In many collections in the Netherlands, the pictures of Begeyn are placed amongst those of the most admired masters. His pencilling is light and free, and his colouring very agreeable. Many of his works are landscapes, with views of rivers, ruins, and pieces of architecture,