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 with the Yarnwinder | Power and ortraits | Small devotional picture by Verrocchio | The Annunciation | The Fotus in the Uterus |
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Jakob Mertens
Jakob Merten (August 11, 1809 - February 22, 1872) was a German Catholic theologian who was born in Wittlich. He studied theology in Trier, where in 1833 he received his ordination. Subsequently he became a chaplain in Trier, where he worked closely with Franz Peter Knoodt (1811-1889). From 1843 to 1868 he was a professor of philosophy at the Episcopal Seminary in Trier. Initially a prominent follower of Anton Genther's philosophy, Merten eventually abandoned Gentherianism as his career progressed. He was author of an essay on Gentherian philosophy titled Hauptfragen der Metaphysik in Verbindung mit der Speculation (Primary Questions of Metaphysics in Association with Speculation) (1840). Other noted works by Merten include: Grundriss der Metaphysik, (Outline of Metaphysics); 1848 Der selige Frings und sein Freund als Antigentherianer; 1852 Bemerkungen zur Metaphysik von Balmes, (Remarks on the Metaphysics of Balmes); 1859
Maurer, Alfred Henry
American Painter, 1868-1932 American painter. He studied at the National Academy of Design, New York, in 1884 and briefly at the Acad?mie Julian, Paris, during 1897. He received critical success with academic paintings of single female figures in interiors and genre scenes of caf? society, which reflected the influence of the work of James Abbott McNeill Whistler and William Merritt Chase, for example At the Caf? (c. 1905; St Petersburg, Hermitage). His long residence in Paris from 1897, his participation in various independent salons and his association with Leo and Gertrude Stein led to his interest in avant-garde art. He may have been one of a group of Americans who studied briefly with Henri Matisse. By 1907 he was producing vigorously painted Fauvist landscapes, such as Landscape with Red Tree
Anna Waser
Anna Waser (1678 - 1714) was a Swiss painter .