|
Segmental Arch
A segmental arch is a type of arch with a circular arc of less than 180 degrees. It is sometimes also called a scheme arch. The segmental arch is one of the strongest arches because it is able to resist Arch#Basic concepts, thrust. To prevent failure, a segmental arch must have a Rise (arch), rise that is equal to at least one-eighth the width of the Span (engineering), span. Segmental arches with a rise that is less than one-eighth of the span width must have a permanent support or frame beneath the arch to prevent failure. The segmental arch is very old (the versions were cut in the rock in Ancient Egypt 2100 BC at Beni Hasan). Since then it was occasionally used in Ancient Greek architecture, Greek temples, utilized in Roman architecture, Roman residential construction, Islamic architecture, and got popular as window pediments during the Renaissance. The closed-spandrel Pont-Saint-Martin (bridge), Pont-Saint-Martin bridge in the Aosta Valley in Italy dates to 25 BC. The first ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Italy
Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land border, as well as List of islands of Italy, nearly 800 islands, notably Sicily and Sardinia. Italy shares land borders with France to the west; Switzerland and Austria to the north; Slovenia to the east; and the two enclaves of Vatican City and San Marino. It is the List of European countries by area, tenth-largest country in Europe by area, covering , and the third-most populous member state of the European Union, with nearly 59 million inhabitants. Italy's capital and List of cities in Italy, largest city is Rome; other major cities include Milan, Naples, Turin, Palermo, Bologna, Florence, Genoa, and Venice. The history of Italy goes back to numerous List of ancient peoples of Italy, Italic peoples—notably including the ancient Romans, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ostia Antica
Ostia Antica () is an ancient Roman city and the port of Rome located at the mouth of the Tiber. It is near modern Ostia, southwest of Rome. Due to silting and the invasion of sand, the site now lies from the sea. The name ''Ostia'' (the plural of ''ostium'') derives from Latin ''os'' 'mouth'. Ostia is now a large archaeological site noted for the excellent preservation of its ancient buildings, magnificent frescoes and impressive mosaics. The city's decline after antiquity led to harbor deterioration, marshy conditions, and reduced population. Sand dunes covering the site aided its preservation. Its remains provide insights into a city of commercial importance. As in Pompeii, Ostia's ruins provide details about Roman urbanism that are not accessible within the city of Rome itself. History Origins Ostia may have been Rome's first '' colonia''. According to legend, Ancus Marcius, the fourth king of Rome, was the first to destroy Ficana, an ancient town that was only fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alconétar Bridge
The Alconétar Bridge ( Spanish: ''Puente de Alconétar''), also known as Puente de Mantible, was a Roman segmental arch bridge in the Extremadura region, Spain. The ancient structure, which featured flattened arches with a span-to-rise ratio of 4–5:1, is one of the earliest of its kind. Due to its design, it is assumed that the bridge was erected in the early 2nd century AD by the emperors Trajan or Hadrian, possibly under the guidance of Apollodorus of Damascus, the most famous architect of the time. The almost 300 m long Alconétar Bridge served as a crossing point for the Roman '' Via de la Plata'', the most important north–south connection in western Hispania, over the Tagus, the longest river of the Iberian Peninsula. It presumably remained in service until the Reconquista, after which numerous early modern reconstruction attempts by Spanish engineers failed. The ruins, which were mainly to be found on the right river bank, were relocated from their original position ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anno Domini
The terms (AD) and before Christ (BC) are used when designating years in the Gregorian calendar, Gregorian and Julian calendar, Julian calendars. The term is Medieval Latin and means "in the year of the Lord" but is often presented using "our Lord" instead of "the Lord", taken from the full original phrase "", which translates to "in the year of our Lord Jesus Christ". The form "BC" is specific to English language, English, and equivalent abbreviations are used in other languages: the Latin (language), Latin form, rarely used in English, is (ACN) or (AC). This calendar era takes as its epoch (date reference), epoch the traditionally reckoned year of the annunciation, conception or Nativity of Jesus, birth of Jesus. Years ''AD'' are counted forward since that epoch and years ''BC'' are counted backward from the epoch. There is no year zero in this scheme; thus the year AD 1 immediately follows the year 1 BC. This dating system was devised in 525 by Dionysius Exiguus but was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saqqara
Saqqara ( : saqqāra[t], ), also spelled Sakkara or Saccara in English , is an Egyptian village in the markaz (county) of Badrashin in the Giza Governorate, that contains ancient burial grounds of Egyptian royalty, serving as the necropolis for the ancient Egyptian capital, Memphis, Egypt, Memphis. Saqqara contains numerous pyramids, including the Pyramid of Djoser, sometimes referred to as the Step Pyramid, and a number of mastaba tombs. Located some south of modern-day Cairo, Saqqara covers an area of around . Saqqara contains the oldest complete stone building complex known in history, the Pyramid of Djoser, built during the Third Dynasty of Egypt, Third Dynasty. Another sixteen Egyptian kings built pyramids at Saqqara, which are now in various states of preservation. High officials added private funeral monuments to this necropolis during the entire History of ancient Egypt, Pharaonic period. It remained an important complex for non-royal burials and cult ceremonies for more ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heb-sed Court
The pyramid of Djoser, sometimes called the Step Pyramid of Djoser or Step Pyramid of Horus Netjerikhet, is an archaeological site in the Saqqara necropolis, Egypt, northwest of the ruins of Memphis.Bard, Kathryn A., and Jean-Philipee Lauer, eds. 1999. "Saqqara, pyramids of the 3rd Dynasty" ''Encyclopedia of the Archaeology of Ancient Egypt''. London: Routledge. 859 It is the first Egyptian pyramid to be built. The 6-tier, 4-sided structure is the earliest colossal stone building in Egypt. It was built in the 27th century BC during the Third Dynasty for the burial of Pharaoh Djoser. The pyramid is the central feature of a vast mortuary complex in an enormous courtyard surrounded by ceremonial structures and decoration. The pyramid went through several revisions and redevelopments of the original plan. The pyramid originally stood tall, with a base of and was clad in polished white limestone. As of 1997 the step pyramid (or proto-pyramid) was considered to be the earliest larg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Four-centred Arch
A four-centred arch (Commonwealth spelling) or four-centered arch (American spelling) is a low, wide type of arch with a pointed apex. Its structure is achieved by drafting two arcs which rise steeply from each springing point on a small radius, and then turning into two arches with a wide radius and much lower springing point. It is a pointed sub-type of the general flattened depressed arch. This type of arch uses space efficiently and decoratively when used for doorways. It is also employed as a wall decoration in which arcade and window openings form part of the whole decorative surface. Two of the most notable types are known as the Persian arch, which is moderately "depressed" and found in Islamic architecture, and the Tudor arch, which is much flatter and found in English architecture. Another variant, the keel arch, has partially straight rather than curved sides and developed in Fatimid architecture. Use in Islamic architecture The four-centered arch is widely used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
China
China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after India, representing 17.4% of the world population. China spans the equivalent of five time zones and Borders of China, borders fourteen countries by land across an area of nearly , making it the list of countries and dependencies by area, third-largest country by land area. The country is divided into 33 Province-level divisions of China, province-level divisions: 22 provinces of China, provinces, 5 autonomous regions of China, autonomous regions, 4 direct-administered municipalities of China, municipalities, and 2 semi-autonomous special administrative regions. Beijing is the country's capital, while Shanghai is List of cities in China by population, its most populous city by urban area and largest financial center. Considered one of six ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hebei
Hebei is a Provinces of China, province in North China. It is China's List of Chinese administrative divisions by population, sixth-most populous province, with a population of over 75 million people. Shijiazhuang is the capital city. It borders Shanxi to the west, Henan to the south, Shandong and Liaoning to the east, and Inner Mongolia to the north; in addition, Hebei entirely surrounds the direct-administered municipalities of Beijing and Tianjin on land. Its population is 96% Han Chinese, 3% Manchu people, Manchu, 0.8% Hui people, Hui, and 0.3% Mongols in China, Mongol. Varieties of Chinese spoken include Jilu Mandarin, the Beijing dialect of Mandarin, and Jin Chinese. During the Spring and Autumn period, Spring and Autumn and Warring States periods (771–226 BC), the region was ruled by the states of Yan (state), Yan and Zhao (state), Zhao. During the Yuan dynasty (1271–1368), the region was called Zhongshu Sheng, Zhongshu. It was called North Zhili during the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xiao River
The Xiao River ( zh, c=瀟水, p=Xiāoshuǐ ) is the Main Stream of the upper Xiang River located in Yongzhou, Hunan. As of 2011 Water Census of China, it has a length of from the headwaters to the confluence in the Ping Island of Yongzhou with the Xiang River West Branch (Left Branch) originating from Guangxi. With the tributaries, its drainage basin area is .As of 2011 Water Census of China, the Xiao River was identified as the Main Stem of the Upper Xiang River. 湘江源头在湖南蓝山, 湘江干流全长948公里, 流域面积94,721平方公里 - The source stream of the Xiang is in Lanshan County, the main river of the Xiang has a length of with a drainage basin area of rough , according thn.xinhuanet.como/ref> Night rain on the Xiaoxiang ( ), one of the Eight Views of Xiaoxiang, is located in this river. Geography The Xiao River borders to the south by the Mengzhu Mountains and Gui River of Xi River tributary, to the east by ''Yangming Mountains'' (阳明山), Chongling ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anji Bridge
The Anji Bridge () is the world's oldest open-spandrel segmental arch bridge of stone construction.This title strictly applies only to the ''sum of attributes given'' (O’Connor, Colin: ''Roman Bridges'', Cambridge University Press 1993, , p.171): Various Roman stone pillar bridges featured wooden open-spandrel segmental arches as early as the 2nd century CE, among them Trajan's bridge, the longest bridge of the world to have been built for over a thousand years. Also, a dozen or more Roman close-spandrel stone segmental arch bridges are known from the 1st century BC onwards, such as the Ponte San Lorenzo (Padua), Alconétar Bridge and the Makestos Bridge (Turkey), the last having half-open spandrels. The 27 segmental arches of the Bridge at Limyra (300 ce) feature span to rise ratios between 5.3 and 6.5 to 1, making it an earlier example of a stone quarter circle segmental arch bridge. This leaves the Anji bridge the title of "the oldest ''open-spandrel'' stone quarter circl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
