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 | Annunciation (detail) st | Studies fur the adoration of the Konige | Profile of a man | Study fur the head of a Madchens |
Related Artists:
Guido da Siena
Italian Byzantine Style Painter, 13th Century He may have made significant advances in the techniques of painting, much as Cimabue much later accomplished. However, there is some debate about this. Guido is primarily known for a painting which is now split into several pieces. The church of S. Domenico in Siena contains a large painting of the Virgin and Child Enthroned with six angels above. The Benedictine convent of the same city has a triangular pinnacle representing the Saviour in benediction, with two angels. This was once a portion of the same composition, which was originally a triptych. The principal section of this picture has a rhymed Latin inscription, giving the painter's name as Guido de Senis, with the date 1221. However, this may not be genuine, and the date may really read as 1281. There is nothing particular to distinguish this painting from other work of the same period except that the heads of the Virgin and Child are much superior ?C in natural character and graceful dignity ?C to anything painted before Cimabue. As a result, there is some dispute as to whether these heads are really the work of a man who painted in 1221, long before Cimabue. Crowe and Cavalcaselle have proposed that the heads were repainted in the 14th century, perhaps by Ugolino da Siena. If Crowe and Cavalcaselle are right, Cimabue maintains his claim to the advancement of the art. Beyond this, little is known of Guido da Siena. A picture in the Academy of Siena is attributed to him (a half-figure of the Virgin and Child, with two angels), which dates (probably) between 1250 and 1300.
William Morris Davis
February 12, 1850 - February 5, 1934,Davis, who was born in Philadelphia, Pennsylvania, was educated at Harvard. He returned to teach there in 1877 after a period as a meteorologist in Argentina and as an assistant with the North Pacific Survey. He became professor of physical geography in 1890 and of geology in 1898. Davis is acknowledged as the founder of geomorphology, the study of landforms. In his The Rivers and Valleys of Pennsylvania (1889) he first introduced what later became known as the Davisian systems of landscape analysis. His aim was to provide an explanatory description of how landforms change in an ideal situation and his most important contribution to this was his introduction of the cycle of erosion into geographical thought. He proposed a complete cycle of youth, maturity, and old age to describe the evolution of a landscape. In youth rivers occupy steep V-shaped valleys while in old age the valleys are broad. The end product would be a flat featureless plain he called a epeneplaine. This was an ideal cycle but in practice the cycle would invariably be interrupted by Earth movements. It was, nevertheless, strongly attacked by German geographers who objected to it on the grounds that it neglected such vital factors as weathering and climate in transforming the landscape. They also believed him to be undermining their argument that landforms could only be discovered by local fieldwork and the production of regional monographs. Davis also produced an influential work,
GHIRLANDAIO, Domenico
Italian Early Renaissance Painter, 1449-1494 Florentine painter, whose family name was Bigordi. He may have studied painting and mosaics under Alesso Baldovinetti. Ghirlandaio was an excellent technician. Keenly observant of the contemporary scene, he depicted many prominent Florentine personalities within his religious narrative paintings. Among his earliest frescoes are the Madonna with the Vespucci Family and the Last Supper (Church of the Ognissanti, Florence). He painted scenes from the life of Santa Fina (collegiate church in San Gimigniano) and frescoes in the Palazzo Vecchio, Florence. In 1481, Pope Sixtus IV called him to Rome, along with Botticelli, to decorate the Sistine Chapel. He painted the Calling of the First Apostles, a scene close in spirit to Masaccio. He returned to Florence to work on the frescoes in the Sassetti Chapel in Santa Trinita. He introduced Sassetti, Corsi, Poliziano, the Medici, and many other contemporaries as participants in the life of St. Francis. Ghirlandaio's most famous achievement is his fresco cycle of the life of Mary and St. John the Baptist for the choir of Santa Maria Novella. Michelangelo served an apprenticeship with him at this time and probably worked on these frescoes. Other examples of his art are the Adoration of the Magi (Uffizi); another Adoration (Hospital of the Innocents); a mosaic of the Annunciation for the Cathedral; a portrait of Francesco Sassetti and his son (Metropolitan Mus.);