1719-1768 Rococo,German,German painter. He studied with his brother, Johann Ludwig Seekatz (b 1711), and with Philipp Hieronymus Brinckmann (1709-61) in Mannheim (1748-51); he became court painter to Landgraf Ludwig VIII von Hesse-Darmstadt in Darmstadt in 1753.  Related Paintings of Johann Conrad Seekatz :. | The Entombment fghfgh | Ascension of Christ sdg | Esther before Ahasuerus | Stigmatization of St Francis | Dona Isabel de Porcel. |
Related Artists:
GIUNTA PISANO
Italian painter, Pisan school (active c. 1229-c. 1254 in Pisa).
Leonardo Da Vinci
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.
Louis-Francois, Baron Lejeune
(3 February 1775, Strasbourg - 29 February 1848) was a French general, painter, and lithographer. His memoirs have frequently been republished and his name is engraved on the Arc de Triomphe. He studied painting in the studio of Pierre-Henri de Valenciennes, alongside Jean-Victor Bertin, but left the studio to volunteer in the Compagnie des arts de Paris in 1792. He received his baptism of fire in the battle of Valmy later that year. He became a sergeant in the 1st Arsenal battalion and in 1793 moved to the artillery at La Fere, assisting in the sieges of Landrecies, Le Quesnoy and Valenciennes. At Valenciennes he became aide-de-camp to general Jacob then, as a lieutenant on attachment to the engineers, took part in the 1794 Holland campaign and the 1795 campaign. Called to the depot in 1798, he succeeded brilliantly in his exams and was made a captain on attachment to the engineers. He became aide-de-camp to marshal Berthier in 1800, a post he retained until 1812 and in which he took an active part in practically all of the Napoleonic campaigns. He was wounded and captured in Spain. He was promoted to full captain after Marengo and chef de bataillon after Austerlitz, also become a knight of the Legion d'honneur and a colonel at the Siege of Saragossa. The German campaign of 1806 brought him to Munich, where he visited the workshop of Alois Senefelder, the inventor of lithography. Lejeune was fascinated by the possibilities of the new method and whilst there he made the drawing on stone of his famous Cossack (printed by C. and ~f. Senefelder, 1806). Whilst he was taking his dinner, and with his horses harnessed and waiting to take him back to Paris, one hundred proofs were printed, one of which he subsequently submitted to Napoleon. The introduction of lithography into France was greatly due to the efforts of Lejeune. In 1812, during the French invasion of Russia, he was made general de brigade and chief of staff to Davout. Frostbitten on the face, Lejeune left his post during the retreat from Russia and was arrested on the orders of Napoleon. Freed in March 1813, Lejeune was then sent to the Illyrian provinces, before rejoining the army under the orders of marshal Oudinot, becoming his chief of staff. During the Saxony campaign, Lejeune was present at the Battle of Lutzen (1813), the crossing of the River Spree and at Bautzen. He was made an officer of the Legion d'honneur and a commander of the Order of Maximilian of Bavaria. At the battle of Hoyersverda, when Below's corps wiped out the 12th corps formed up in square on the plain, Lejeune (at risk of being kidnapped) ventured into the enemy lines with one battalion, general Wolf's cavalry and six 12 pounder guns. He thus broke the whole of the Prussian artillery and saved marshal Oudinot and his army. Wounded several times and lastly at Hanau, he was authorised to leave the army in November 1813 after more than 20 years' service. After his departure from the army, he devoted himself to painting.