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Battle Of Versinikia
The Battle of Versinikia ( bg, Битката при Версиникия; el, Μάχη της Βερσινικίας) was fought in 813 between the Byzantine Empire and the Bulgarian Empire, near the city of Adrianople (Edirne). While the Bulgarians, led by Krum, had an army about half the size of the Byzantine Empire, they were victorious, resulting in the dethroning of Byzantine Emperor Michael I Rangabe (811–813) by Leo V the Armenian. The battle was a major success for the Bulgarians and further strengthened the Bulgarian position after their victory over Nicephorus I two years earlier. After the battle they took ''de facto'' control of the whole of Eastern Thrace (until the Byzantine–Bulgarian Treaty of 815) with the exception of a few castles that remained in Byzantine control. For the first time in Bulgarian history, the way to Constantinople was opened. Krum died at the height of the preparation for the final siege of the Byzantine capital on the 13th of April 814. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Staurakios
Staurakios or Stauracius ( gr, Σταυράκιος, links=no; early 790s – 11 January 812AD) was Byzantine emperor from 26 July to 2 October 811. He was born in the early 790s, probably between 791 and 793, to Nikephoros I and an unknown woman. Nikephoros seized the throne of the Byzantine Empire from Empress Irene in 802, and elevated Staurakios to co-emperor on 25 December 803. On 20 December 807, a bride show was held by Nikephoros to select a wife for Staurakios, which resulted in his marriage to Theophano of Athens, a kinswoman of Irene. Little else is known of him until he came to take the throne upon the death of Nikephroros. Staurakios took part in an invasion of the Bulgarian Khanate in 811, alongside his father and brother-in-law. Although initially successful, with the Byzantines laying siege to the Bulgarian capital of Pliska and defeating a relief force, they were soon ambushed by Khan Krum, and trapped in a small valley. The Bulgarians then attacked, startin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siphon
A siphon (from grc, σίφων, síphōn, "pipe, tube", also spelled nonetymologically syphon) is any of a wide variety of devices that involve the flow of liquids through tubes. In a narrower sense, the word refers particularly to a tube in an inverted "U" shape, which causes a liquid to flow upward, above the surface of a reservoir, with no pump, but powered by the fall of the liquid as it flows down the tube under the pull of gravity, then discharging at a level lower than the surface of the reservoir from which it came. There are two leading theories about how siphons cause liquid to flow uphill, against gravity, without being pumped, and powered only by gravity. The traditional theory for centuries was that gravity pulling the liquid down on the exit side of the siphon resulted in reduced pressure at the top of the siphon. Then atmospheric pressure was able to push the liquid from the upper reservoir, up into the reduced pressure at the top of the siphon, like in a baromet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper
Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins, and constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals that can occur in nature in a directly usable metallic form ( native metals). This led to very early human use in several regions, from circa 8000 BC. Thousands of years later, it was the first metal to be smelted from sulfide ores, circa 5000 BC; the first metal to be cast into a shape in a mold, c. 4000 BC; and the first metal to be purposely alloyed with another metal, tin, to create ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arab
The Arabs (singular: Arab; singular ar, عَرَبِيٌّ, DIN 31635: , , plural ar, عَرَب, DIN 31635: , Arabic pronunciation: ), also known as the Arab people, are an ethnic group mainly inhabiting the Arab world in Western Asia, North Africa, the Horn of Africa, and the western Indian Ocean islands (including the Comoros). An Arab diaspora is also present around the world in significant numbers, most notably in the Americas, Western Europe, Turkey, Indonesia, and Iran. In modern usage, the term "Arab" tends to refer to those who both carry that ethnic identity and speak Arabic as their native language. This contrasts with the narrower traditional definition, which refers to the descendants of the tribes of Arabia. The religion of Islam was developed in Arabia, and Classical Arabic serves as the language of Islamic literature. 93 percent of Arabs are Muslims (the remainder consisted mostly of Arab Christians), while Arab Muslims are only 20 percent of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siege Machine
A siege engine is a device that is designed to break or circumvent heavy castle doors, thick city walls and other fortifications in siege warfare. Some are immobile, constructed in place to attack enemy fortifications from a distance, while others have wheels to enable advancing up to the enemy fortification. There are many distinct types, such as siege towers that allow foot soldiers to scale walls and attack the defenders, battering rams that damage walls or gates, and large ranged weapons (such as ballistae, catapults/trebuchets and other similar constructions) that attack from a distance by launching projectiles. Some complex siege engines were combinations of these types. Siege engines are fairly large constructions – from the size of a small house to a large building. From antiquity up to the development of gunpowder, they were made largely of wood, using rope or leather to help bind them, possibly with a few pieces of metal at key stress points. They could launch simple ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nessebar
Nesebar (often transcribed as Nessebar and sometimes as Nesebur, bg, Несебър, pronounced ) is an ancient city and one of the major seaside resorts on the Bulgarian Black Sea Coast, located in Burgas Province. It is the administrative centre of the homonymous Nesebar Municipality. Often referred to as the "''Pearl of the Black Sea''", Nesebar is a rich city-museum defined by more than three millennia of ever-changing history. The small city exists in two parts separated by a narrow man-made isthmus with the ancient part of the settlement on the peninsula (previously an island), and the more modern section (i.e. hotels, later development) on the mainland side. The older part bears evidence of occupation by a variety of different civilisations over the course of its existence. It is one of the most prominent tourist destinations and seaports on the Black Sea, in what has become a popular area with several large resorts—the largest, Sunny Beach, is situated immediately to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Byzantine Emperor
This is a list of the Byzantine emperors from the foundation of Constantinople in 330 AD, which marks the conventional start of the Eastern Roman Empire, to its fall to the Ottoman Empire in 1453 AD. Only the emperors who were recognized as legitimate rulers and exercised sovereign authority are included, to the exclusion of junior co-emperors (''symbasileis'') who never attained the status of sole or senior ruler, as well as of the various usurpers or rebels who claimed the imperial title. The following list starts with Constantine the Great, the first Christian emperor, who rebuilt the city of Byzantium as an imperial capital, Constantinople, and who was regarded by the later emperors as the model ruler. It was under Constantine that the major characteristics of what is considered the Byzantine state emerged: a Roman polity centered at Constantinople and culturally dominated by the Greek East, with Christianity as the state religion. The Byzantine Empire was the direct le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulgarian Lands Across The Danube
The Bulgarian lands across the Danube or Transdanubian Bulgaria ( bg, Отвъддунавска България) is a term by which Bulgarian historiography means the territories under the rule and control of the Bulgarian Empire north of the Danube. These territories today cover the territory of Romania and Moldova, eastern Hungary, Vojvodina from Serbia and Budjak in Ukraine. In the Middle Ages the Bulgarian Empire controlled vast areas to the north of the river Danube (with interruptions) from its establishment in 681 to its fragmentation in 1371-1422. These lands were called by contemporary Byzantine historians ''Bulgaria across the Danube''. Original information for the centuries-old Bulgarian rule there is scarce as the archives of the Bulgarian rulers were destroyed and little is mentioned for this area in Byzantine or Hungarian manuscripts. First Bulgarian Empire After the defeat of Great Bulgaria by the Khazars and following Khan Kubrat's death in 668 a large grou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Struma River
The Struma or Strymónas ( bg, Струма ; el, Στρυμόνας ; tr, (Struma) Karasu , 'black water') is a river in Bulgaria and Greece. Its ancient name was Strymṓn (Greek: Στρυμών ). Its drainage area is , of which in Bulgaria, in Greece and the remaining in North Macedonia and Serbia. It takes its source from the Vitosha Mountain in Bulgaria, runs first westward, then southward, forming a number of gorges, enters Greek territory at the Kula village. In Greece it is the main waterway feeding and exiting from Lake Kerkini, a significant centre for migratory wildfowl. The river flows into the Strymonian Gulf in Aegean Sea, near Amphipolis in the Serres regional unit. The river's length is (of which in Bulgaria, making it the country's fifth-longest and one of the longest rivers that run solely in the interior of the Balkans. Parts of the river valley belong to a Bulgarian (Pirin Macedonia) coal-producing area, more significant in the past than nowadays; the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thrace
Thrace (; el, Θράκη, Thráki; bg, Тракия, Trakiya; tr, Trakya) or Thrake is a geographical and historical region in Southeast Europe, now split among Bulgaria, Greece, and Turkey, which is bounded by the Balkan Mountains to the north, the Aegean Sea to the south, and the Black Sea to the east. It comprises southeastern Bulgaria (Northern Thrace), northeastern Greece (Western Thrace), and the European part of Turkey ( East Thrace). The region's boundaries are based on that of the Roman Province of Thrace; the lands inhabited by the ancient Thracians extended in the north to modern-day Northern Bulgaria and Romania and to the west into the region of Macedonia. Etymology The word ''Thrace'' was first used by the Greeks when referring to the Thracian tribes, from ancient Greek Thrake (Θρᾴκη), descending from ''Thrāix'' (Θρᾷξ). It referred originally to the Thracians, an ancient people inhabiting Southeast Europe. The name ''Europe'' first referred to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
