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 :. | Mona Lisa (La Gioconda) sdg | The Baptism of Christ (detail) sg | The Adoration of the Magi | Portrait of Ginevra de' Benci sg | The Madonna of the Carnation g |
Related Artists:
johan hammar

Rudolf Koller
Rudolf Koller (1828-1905) was a Swiss painter.
Thomas De Keyser
1586-1667 Dutch Thomas De Keyser Gallery De Keyser excelled as a portrait painter, and was the most in-demand portrait painter in the Netherlands until the 1630s, when Rembrandt eclipsed him in popularity. Rembrandt was influenced by his work, and many of de Keyser's paintings were later falsely attributed to Rembrandt. His portraiture is full of character and masterly in handling, and often distinguished by a rich golden glow of color and Rembrandtesque chiaroscuro. Some of his portraits are life-size, but the artist generally preferred to keep them on a considerably smaller scale, like the famous Four Amsterdam burgomasters assembled to receive Marie de Medici in 1638, now on display at the Mauritshuis museum in The Hague. In addition to portraits, he also executed some historical and mythological pictures, such as the Theseus and Ariadne in the Amsterdam town hall, now the Royal Palace. De Keyser also worked as an architect. From 1662 until his death in 1667 he oversaw construction of the new Amsterdam town hall, now Royal Palace. De Keyser was a son of the architect and sculptor Hendrik de Keyser. We have no definite knowledge of his training, and but scant information as to the course of his life. Aert Pietersz, Cornelis vander Voort, Werner van Valckert and Nicolas Elias are accredited by different authorities with having developed his talent. In the 1640s, de Keyser received very few painting commissions, and was forced to seek income elsewhere. He owned a basalt business from 1640 until 1654, when he returned to painting. The Rijksmuseum in Amsterdam has the largest collection of paintings by de Keyser. His work can also be seen at the Louvre in Paris, the Metropolitan Museum of Art in New York City, the Hermitage in Saint Petersburg and the National Gallery in London, among others. The Stedelijk Museum modern art museum in Amsterdam carries a statue of de Keyser on its facade. A street in Enschede is named for him. A contemporary namesake of the painter was Thomas de Keyser (Utrecht, 1597-1651), an actor and nephew of Hendrick de Keyser.