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 :. | Portrait de femme,dit a tort La belle ferronniere | Small devotional picture by Verrocchio | Annunciation (detail) dfe | The Annunciation | The Fotus in the Uterus |
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Bicci Di Neri
(1419-1491) was an Italian painter of the Renaissance. A prolific painter of mainly religious themes, he was active mainly in Florence and in the medium of tempera. His father was Bicci di Lorenzo. His grandfather, Lorenzo di Bicci was also a painter in Florence, a pupil of Spinello Aretino. Neri di Bicci's main works include a St. John Gualbert Enthroned, with Ten Saints for the church of Santa Trinita, an Annunciation (1464) in the Florentine Academy, two altarpieces in the Diocesan Museum of San Miniato, a Madonna with Child Enthroned in the Pinacoteca Nazionale of Siena, and a Coronation of the Virgin (1472) in the abbey church at San Pietro a Ruoti (Bucine. He also painter numerous works in the area of Volterra. His journals from the years 1453-1475, including the rates of remuneration for his work, are still preserved in the library of the Uffizi Gallery. They are known as Ricordanze.
abraham sehopfer

Matthias Withoos
(1627-1703), also known as Calzetta Bianca and Calzetti, was a Dutch painter of still lifes and city scenes, best-known for the details of insects, reptiles and undergrowth in the foreground of his pictures. Withoos was born in Amersfoort. He studied under Jacob van Campen, at his painters' school just outside the city at his country house, and then with Otto Marseus van Schrieck. When he was 21, Withoos made a trip to Rome with Van Schrieck, and Willem van Aelst. There they joined the group of northern artists known as the "Bentvueghels" ("Birds of a feather"), and Withoos went by the alias "Calzetta Bianca" ("White Hose") a translation of his name into Italian. Withoos' work caught the eye of the cardinal Leopoldo de Medici, who commissioned various paintings from him. In 1653, the artist returned to Amersfoort.When French troops occupied Amersfoort in the "Disastrous Year" of 1672, Withoos fled from Amersfoort to Hoorn, where he would remain until his death in 1703.