(November 30, 1825-November 15, 1910), Danish genre painter, was born in Copenhagen to Johann Gottlieb Exner, a Czech musician from Bohemia, who came to Denmark during the Napoleonic period, and his wife Karen Jørgensdatter. Exner originally intended on becoming a history painter, but quickly found his niche, however, in genre painting, the most popular and lucrative painting style of his era.  Related Paintings of Julius Exner :. | Nasturtiums in The Dance (I) (mk35) | Portrait of Peter Monamy | The ceiling | Diana and Actaeon | Two Hands (nn04) |
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Wilhelm von Kobell
1766-1853 German Wilhelm von Kobell Gallery Kobell was born in Mannheim, the son of Ferdinand Kobell, a landscape painter who cited Claude Lorrain as his influence. Wilhelm's initial lessons were supplied by his father and his uncle, Franz Kobell. He received further training under Franz Anton, von Leydendorf and Egid Verhelst in the art of engraving at the Zeichnungsakademie in Mannheim. During this time he practiced various styles, including 17th-century Dutch painting and 18th-century English art. He was supported by Charles Theodore who compensated him an annual sum of 500 florins from 1792 until Theodore's death in 1799. Throughout his life Kobell traveled to England, France and Italy but ultimately based his style on Dutch art.
Bergognone
active in Milan 1481-1522
LEONARDO da Vinci
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.