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Promontories
A promontory is a raised mass of landform, land that projects into a Upland and lowland, lowland or a body of water (in which case it is a peninsula). Most promontories either are formed from a hard ridge of rock that has resisted the erosion, erosive forces that have removed the softer rock to the sides of it, or are the high ground that remains between two Valley, river valleys where they form a confluence. One type of promontory is a headland, or head. Promontories in history Located at the edge of a landmass, promontories offer a natural defense against enemies, as they are often surrounded by water and difficult to access. Many ancient and modern forts and castles have been built on promontories for this reason. One of the most famous examples of promontory forts is the Citadel of Namur in Belgium. Located at the confluence of the Meuse and Sambre rivers, the citadel has been a prime fortified location since the 10th century. The surrounding rivers act as a natural moat, m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
10th Century
The 10th century was the period from 901 (represented by the Roman numerals CMI) through 1000 (M) in accordance with the Julian calendar, and the last century of the 1st millennium. In China, the Song dynasty was established, with most of China reuniting after the fall of the Tang dynasty and the following Five Dynasties and Ten Kingdoms period. The Muslim World experienced a cultural zenith, especially in al-Andalus under the Caliphate of Córdoba and in the Samanid Empire under Ismail Samani. The Abbasid Caliphate continued to exist but with reduced central authority. Additionally, there was a cultural flourishing for the Byzantine Empire, which also reconquered some lost territories, and the First Bulgarian Empire, as well as the Holy Roman Empire during the Ottonian Renaissance. The historian Lynn White mentions of the period that "to the modern eye, it is very nearly the darkest of the Dark Ages ... if it was dark, it was the darkness of the womb". Caesar Baronius ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landforms
A landform is a land feature on the solid surface of the Earth or other planetary body. They may be natural or may be anthropogenic (caused or influenced by human activity). Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. Landforms include hills, mountains, canyons, and valleys, as well as shoreline features such as bays, peninsulas, and seas, including submerged features such as mid-ocean ridges, volcanoes, and the great oceanic basins. Physical characteristics Landforms are categorized by characteristic physical attributes such as elevation, slope, orientation, structure stratification, rock exposure, and soil type. Gross physical features or landforms include intuitive elements such as berms, cliffs, hills, mounds, peninsulas, ridges, rivers, valleys, volcanoes, and numerous other structural and size-scaled (e.g. ponds vs. lakes, hills vs. mountains) elements including various kinds of inland and oceani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middle Ages
In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similarly to the post-classical period of global history. It began with the fall of the Western Roman Empire and transitioned into the Renaissance and the Age of Discovery. The Middle Ages is the middle period of the three traditional divisions of Western history: classical antiquity, the medieval period, and the modern period. The medieval period is itself subdivided into the Early, High, and Late Middle Ages. Population decline, counterurbanisation, the collapse of centralised authority, invasions, and mass migrations of tribes, which had begun in late antiquity, continued into the Early Middle Ages. The large-scale movements of the Migration Period, including various Germanic peoples, formed new kingdoms in what remained of the Western Roman Empire. In the 7th century, North Africa and the Middle East—once part of the Byzantine Empire� ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ajuran Sultanate
The Ajuran Sultanate (, ), natively referred to as Ajuuraan, and often simply Ajuran/Ajur, was a Muslims, Muslim empire in the Horn of Africa that thrived from the Late Middle Ages, late medieval and Early modern period, early modern period. Founded by Somali people, Somali Sultans its rise to prominence began during the 13th century, 13th and 14th century, 14th centuries and by the 15th century, it was Africa, Africa's only 'hydraulic empire'. Through a strong centralized administration and an aggressive military stance towards invaders, the Ajuran Empire successfully resisted Oromo expansion, Oromo invasions from the west and fought against Somali–Portuguese conflicts, Portuguese incursions from the east. The Ajuran were among the great centres of commerce in the contemporary African world. Trading routes dating from ancient and early medieval periods of Maritime history of Somalia, Somali maritime enterprise were strengthened and re-established, foreign trade and commerce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Somalia
Somalia, officially the Federal Republic of Somalia, is the easternmost country in continental Africa. The country is located in the Horn of Africa and is bordered by Ethiopia to the west, Djibouti to the northwest, Kenya to the southwest, the Gulf of Aden to the north, and the Indian Ocean to the east. Somalia has the longest coastline on Africa's mainland. Somalia has an estimated population of 18.1 million, of which 2.7 million live in the capital and largest city, Mogadishu. Around 85% of Somalia's residents are ethnic Somali people, Somalis. The official languages of the country are Somali language, Somali and Arabic, though Somali is the Languages of Somalia, primary language. Somalia has historic and religious ties to the Arab world. The people in Somalia are mainly Muslims, following the Sunni Islam, Sunni branch.. In antiquity, Somalia was an important commercial center. During the Middle Ages, several powerful Somali empires dominated the regional trade, including th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ras Bar Balla
Ras Bar Balla () is a historic town in the southern Lower Juba region of Somalia. Overview An ancient area of occupation, Ras Bar Balla is situated on a small promontory. The settlement contains two tomb A tomb ( ''tumbos'') or sepulchre () is a repository for the remains of the dead. It is generally any structurally enclosed interment space or burial chamber, of varying sizes. Placing a corpse into a tomb can be called '' immurement'', alth ...s: one decorated with rectangular panels, the other plain in design. Today, it is mainly used as a resting place for Somali herders and their flock.Archaeological Remains on the Southern Somali Coast by Hilary Costa Sanseverino pg 162 It is believed to date back to the powerful Ajuran Empire. See also * Damo * Essina * Gondershe * Hannassa * Malao * Mosylon * Opone * Ras Hafun * Sarapion * Somali maritime history References Archaeological sites in Somalia Former populated places in Somalia Ajuran Sultanate Archaeological ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Promontory Fort
A promontory fort is a fortification, defensive structure located above a steep cliff, often only connected to the mainland by a small neck of land, thus using the topography to reduce the Rampart (fortification), ramparts needed. The oldest known promontory fort is Amnya I in Siberia which was established as a fortified site in the late 7th millennium BC. Although their dating is problematic, most seem to date to the Iron Age. They are mainly found in Ireland, Brittany, the Orkney Islands, the Isle of Man, Devon, the Channel Islands and Cornwall. Ireland Only a few Irish promontory forts have been excavated and most date to the Iron Age, though some, like Dunbeg Fort (County Kerry) might have originated in the Bronze Age. Others, like Dalkey Island (County Dublin) contain imported Eastern Mediterranean pottery and have been reoccupied and changed in the early medieval period. Some, like Doonmore (near Dingle, County Kerry) are associated with the Middle Ages. Dunbeg contains an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ireland
Ireland (, ; ; Ulster Scots dialect, Ulster-Scots: ) is an island in the North Atlantic Ocean, in Northwestern Europe. Geopolitically, the island is divided between the Republic of Ireland (officially Names of the Irish state, named Irelanda sovereign state covering five-sixths of the island) and Northern Ireland (part of the United Kingdomcovering the remaining sixth). It is separated from Great Britain to its east by the North Channel (Great Britain and Ireland), North Channel, the Irish Sea, and St George's Channel. Ireland is the List of islands of the British Isles, second-largest island of the British Isles, the List of European islands by area, third-largest in Europe, and the List of islands by area, twentieth-largest in the world. As of 2022, the Irish population analysis, population of the entire island is just over 7 million, with 5.1 million in the Republic of Ireland and 1.9 million in Northern Ireland, ranking it the List of European islands by population, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pittsburgh, Pennsylvania
Pittsburgh ( ) is a city in Allegheny County, Pennsylvania, United States, and its county seat. It is the List of municipalities in Pennsylvania#Municipalities, second-most populous city in Pennsylvania (after Philadelphia) and the List of United States cities by population, 67th-most populous city in the U.S., with a population of 302,971 as of the 2020 United States census, 2020 census. The city is located in Western Pennsylvania, southwestern Pennsylvania at the confluence of the Allegheny River and Monongahela River, which combine to form the Ohio River. It anchors the Greater Pittsburgh, Pittsburgh metropolitan area, which had a population of 2.457 million residents and is the largest metro area in both the Ohio Valley and Appalachia, the Pennsylvania metropolitan areas, second-largest in Pennsylvania, and the List of metropolitan statistical areas, 26th-largest in the U.S. Pittsburgh is the principal city of the greater Pittsburgh–New Castle–Weirton combined statistic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monongahela River
The Monongahela River ( , ), sometimes referred to locally as the Mon (), is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed August 15, 2011 river on the Allegheny Plateau in north-central West Virginia and Southwestern Pennsylvania. The river flows from the confluence of its west and east forks in north-central West Virginia northeasterly into southwestern Pennsylvania, then northerly to Pittsburgh and its confluence with the Allegheny River to form the Ohio River. The river includes a series of locks and dams that makes it navigable. Etymology The Unami word ''Monongahela'' means "falling banks", in reference to the geological instability of the river's banks. Moravian missionary David Zeisberger (1721–1808) gave this account of the naming: "In the Indian tongue the name of this river was ''Mechmenawungihilla'' (alternatively spelled ''Menawngihella''), which signifies a high bank, which is ever washed o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allegheny River
The Allegheny River ( ; ; ) is a tributary of the Ohio River that is located in western Pennsylvania and New York (state), New York in the United States. It runs from its headwaters just below the middle of Pennsylvania's northern border, northwesterly into New York, then in a zigzag southwesterly across the border and through Western Pennsylvania to join the Monongahela River at the Forks of the Ohio at Point State Park in Downtown Pittsburgh, Pennsylvania. The Allegheny River is, by volume, the main headstream of both the Ohio and Mississippi Rivers. Historically, the Allegheny was considered to be the upper Ohio River by both Native Americans and European settlers. This shallow river has been made navigable upstream from Pittsburgh to East Brady, Pennsylvania, East Brady by a series of locks and dams that were constructed during the early 20th century. A 24-mile-long portion of the upper river in Warren County, Pennsylvania, Warren and McKean County, Pennsylvania, McKean c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
