Italian Byzantine Style Painter, ca.1290-1348 Ambrogio Lorenzetti (or Ambruogio Laurati; c. 1290 ?C June 9, 1348) was an Italian painter of the Sienese school. He was active between approximately from 1317 to 1348. His elder brother was the painter Pietro Lorenzetti. His work shows the influence of Simone Martini, although more naturalistic. The earliest dated work of the Sienese painter is a Madonna and Child (1319, Museo Diocesano, San Casciano). His presence was documented in Florentine up until 1321. He would return there after spending a number of years in Siena. The frescoes on the walls of the Hall of the Nine (Sala dei Nove) or Hall of the Peace (Sala della Pace) in the Palazzo Pubblico of Siena are one of the masterworks of early renaissance secular painting. The "nine" was the oligarchal assembly of guild and monetary interests that governed the republic. Three walls are painted with frescoes consisting of a large assembly of allegorical figures of virtues in the Allegory of Good Government . In the other two facing panels, Ambrogio weaves panoramic visions of Effects of Good Government on Town and Country, and Allegory of Bad Government and its Effects on Town and Country (also called "Ill-governed Town and Country"). The better preserved "well-governed town and country" is an unrivaled pictorial encyclopedia of incidents in a peaceful medieval "borgo" and countryside. The first evidence of the existence of the hourglass can be found in one of his paintings. Like his brother, he is believed to have died of bubonic plague 1348. Giorgio Vasari includes a biography of Lorenzetti in his Lives.  Related Paintings of Ambrogio Lorenzetti :. | Allegory of Good Government | The Presentation in the Temple | St.Nicholas Offers Three Girls Their Dowry and St.Nicholas Is Elected Bishop of Mira | Allegory of Good and Bad Government | Altarpiece of St Proculus |
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John Boyne
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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,
Bogdan Villevalde
painted Feat of Cavalry Regiment at the battle of Austerlitz in 1805.