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Crenellation
A battlement, in defensive architecture, such as that of city walls or castles, comprises a parapet (a defensive low wall between chest-height and head-height), in which gaps or indentations, which are often rectangular, occur at intervals to allow for the launch of arrows or other projectiles from within the defences. These gaps are termed embrasures, also called crenels or crenelles, and a wall or building with them is described as ; alternative older terms are and . The act of adding crenels to a previously unbroken parapet is termed crenellation. The function of battlements in war is to protect the defenders by giving them part of the parapet to hide behind, from which they can quickly expose themselves to launch projectiles, then retreat behind the parapet. A defensive building might be designed and built with battlements, or a manor house might be fortified by adding battlements, where no parapet previously existed, or cutting crenellations into its existing parapet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Battlement (PSF)
A battlement, in defensive architecture, such as that of city walls or castles, comprises a parapet (a defensive low wall between chest-height and head-height), in which gaps or indentations, which are often rectangular, occur at intervals to allow for the launch of arrows or other projectiles from within the defences. These gaps are termed embrasures, also called crenels or crenelles, and a wall or building with them is described as ; alternative older terms are and . The act of adding crenels to a previously unbroken parapet is termed crenellation. The function of battlements in war is to protect the defenders by giving them part of the parapet to hide behind, from which they can quickly expose themselves to launch projectiles, then retreat behind the parapet. A defensive building might be designed and built with battlements, or a manor house might be fortified by adding battlements, where no parapet previously existed, or cutting crenellations into its existing parapet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Crenation
Crenation (from modern Latin ''crenatus'' meaning "scalloped or notched", from popular Latin ''crena'' meaning "notch") in botany and zoology, describes an object's shape, especially a leaf or shell, as being round-toothed or having a scalloped edge. The descriptor can apply to objects of different types, including cells, where one mechanism of crenation is the contraction of a cell after exposure to a Tonicity#Hypertonic solution, hypertonic solution, due to the loss of water through osmosis. In a hypertonic environment, the cell has a lower concentration of solutes than the surrounding extracellular fluid, and water diffusion, diffuses out of the cell by osmosis, causing the cytoplasm to decrease in volume. As a result, the cell shrinks and the cell membrane develops abnormal notchings. Pickled cucumber, Pickling cucumbers and Curing (food preservation), salt-curing of meat are two practical applications of crenation. Plasmolysis is the term which describes plant cells when th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Castle
A castle is a type of fortification, fortified structure built during the Middle Ages predominantly by the nobility or royalty and by Military order (monastic society), military orders. Scholars usually consider a ''castle'' to be the private fortified house, fortified residence of a lord or noble. This is distinct from a mansion, palace, and villa, whose main purpose was exclusively for ''pleasance'' and are not primarily fortresses but may be fortified. Use of the term has varied over time and, sometimes, has also been applied to structures such as hill forts and 19th- and 20th-century homes built to resemble castles. Over the Middle Ages, when genuine castles were built, they took on a great many forms with many different features, although some, such as curtain wall (fortification), curtain walls, arrowslits, and portcullises, were commonplace. European-style castles originated in the 9th and 10th centuries after the fall of the Carolingian Empire, which resulted ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Machicolation
In architecture, a machicolation () is an opening between the supporting corbels of a battlement through which defenders could target attackers who had reached the base of the defensive wall. A smaller related structure that only protects key points of a fortification are referred to as Bretèche. Machicolation, hoarding, bretèche, and murder holes are all similar defensive features serving the same purpose, that is to enable defenders atop a defensive structure to target attackers below. The primary benefit of the design allowed defenders to remain behind cover rather than being exposed when leaning over the parapet. They were common in defensive fortifications until the widespread adoption of gunpowder weapons made them obsolete. Etymology The word machicolation derives from Old French , mentioned in Medieval Latin">-4; we might wonder whether there's a point at which it's appropriate to talk of the beginnings of French, that is, when it wa ... , mentioned in Medieval Lat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Letters Patent
Letters patent (plurale tantum, plural form for singular and plural) are a type of legal instrument in the form of a published written order issued by a monarch, President (government title), president or other head of state, generally granting an office, right, government-granted monopoly, monopoly, title or status to a person or corporation. Letters patent can be used for the creation of corporations, government offices, to grant city status or heraldry, coats of arms. Letters patent are issued for the appointment of representatives of the Crown, such as governors and governor-general, governors-general of Commonwealth realms, as well as appointing a Royal Commission. In the United Kingdom, they are also issued for the creation of peers of the realm. A particular form of letters patent has evolved into the modern intellectual property patent (referred to as a utility patent or design patent in United States patent law) granting exclusive rights in an invention or design. In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Closed-circuit Television
Closed-circuit television (CCTV), also known as video surveillance, is the use of closed-circuit television cameras to transmit a signal to a specific place on a limited set of monitors. It differs from broadcast television in that the signal is not openly transmitted, though it may employ point-to-point, point-to-multipoint (P2MP), or mesh wired or wireless links. Even though almost all video cameras fit this definition, the term is most often applied to those used for surveillance in areas that require additional security or ongoing monitoring ( videotelephony is seldom called "CCTV"). The deployment of this technology has facilitated significant growth in state surveillance, a substantial rise in the methods of advanced social monitoring and control, and a host of crime prevention measures throughout the world. Though surveillance of the public using CCTV is common in many areas around the world, video surveillance has generated significant debate about balancing its us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Mark (money)
The mark was a currency or unit of account in many states. It is named for the mark unit of weight. The word ''mark'' comes from a merging of three Germanic words, Latinised in 9th-century post-classical Latin as ', ', ' or '. It was a measure of weight mainly for gold and silver, commonly used throughout Europe and often equivalent to . Considerable variations, however, occurred throughout the Middle Ages. the only circulating currency named "mark" is the Bosnia and Herzegovina convertible mark. List of currencies named "mark" or similar "Mark" can refer * to one of the following historical German currencies: ** Since the 11th century: the , used in the Electorate of Cologne; ** 1319: the , minted and used by the North German Hanseatic city of Stralsund and various towns in Pomerania; ** 1502: the , a uniform coinage for the '' Wends'' () Hanseatic cities of Lübeck, Hamburg, Wismar, Lüneburg, Rostock, Stralsund, Anklam, among others, who joined the Wends Coinage Uni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Corbel
In architecture, a corbel is a structural piece of stone, wood or metal keyed into and projecting from a wall to carry a wikt:superincumbent, bearing weight, a type of bracket (architecture), bracket. A corbel is a solid piece of material in the wall, whereas a console is a piece applied to the structure. A piece of timber projecting in the same way was called a "tassel" or a "bragger" in England. The technique of corbelling, where rows of corbels deeply keyed inside a wall support a projecting wall or parapet, has been used since Neolithic (New Stone Age) times. It is common in medieval architecture and in the Scottish baronial style as well as in the vocabulary of classical architecture, such as the modillions of a Corinthian order, Corinthian cornice. The corbel arch and corbel vault use the technique systematically to make openings in walls and to form ceilings. These are found in the early architecture of most cultures, from Eurasia to Pre-Columbian architecture. A conso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Buhen
Buhen, alternatively known as Βοὥν (Bohón) in Ancient Greek, stands as a significant ancient Egyptian settlement on the western bank of the Nile, just below the Second Cataract in present-day Northern State, Sudan. Its origins trace back to the Old Kingdom period (about 2686–2181 BCE), where it served as an Egyptian colonial town, particularly recognized for copper smelting. In 1962, archaeological discoveries brought to light an ancient copper manufacturing facility encircled by an imposing stone barrier, indicating its origin during the rule of Sneferu in the 4th Dynasty. Inscriptions and graffiti disclosed a continuous Egyptian presence spanning two centuries, only to be interrupted by migration from the southern regions in the 5th Dynasty. History of Buhen In the Old Kingdom (about 2686–2181 BCE), there was an Egyptian colonial town at Buhen, which was also used for copper working. An archaeological investigation in 1962 revealed what was described as an ancie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Assyrian Attack On A Town
Assyrian may refer to: * Assyrian people, an indigenous ethnic group of Mesopotamia. * Assyria, a major Mesopotamian kingdom and empire. ** Early Assyrian Period ** Old Assyrian Period ** Middle Assyrian Empire ** Neo-Assyrian Empire ** Post-imperial Assyria * Assyrian language (other) * Assyrian Church (other) * SS ''Assyrian'', several cargo ships * ''The Assyrian'' (novel), a novel by Nicholas Guild * The Assyrian (horse), winner of the 1883 Melbourne Cup See also * Assyria (other) * Syriac (other) * Assyrian homeland, a geographic and cultural region in Northern Mesopotamia traditionally inhabited by Assyrian people * Syriac language, a dialect of Middle Aramaic that is the minority language of Syrian Christians * Upper Mesopotamia * Church of the East (other) Church of the East, also called ''Nestorian Church'', an Eastern Christian denomination formerly spread across Asia, separated since the schism of 1552. Church of the E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Earl Of Chester
The Earldom of Chester () was one of the most powerful earldoms in medieval England, extending principally over the counties of Cheshire and Flintshire. Since 1301 the title has generally been granted to heirs apparent to the English throne, and after 1707 the British throne. From the late 14th century, it has been given only in conjunction with that of Prince of Wales. Honour of Chester and County Palatinate The County of Cheshire was held by the powerful Earls (or "Counts" from the Norman-French) of Chester from the late eleventh century, and they held land all over England, comprising "the honour of Chester". By the late twelfth century (if not earlier) the earls had established a position of power as ''quasi''-princely rulers of Cheshire that led to the later establishment of the County Palatine of Chester and Flint. Such was their power that ''Magna Carta'' set down by King John did not apply to Cheshire and the sixth earl was compelled to issue his own version. Co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |