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- Slavic, Bulgar and Thracian tribes lived on the territory of the Bulgarian state before its foundation.
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- The Bulgarian state was founded in 681. For its founder is considered Asparouh khan.
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- During the reign of Khan Krum (803-814) in Bulgaria were created the first written laws.
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- 864 Christianity was adopted as an official religion in Bulgaria during the reign of Boris I.
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- 886 The new script (Glagolitic) created by Cyril and Methodius came in the Bulgarian lands. In the early tenth century was developed a new alphabet called Cyrillic.
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- 893 – 927 Bulgaria bordered by three seas - the Aegean, Adriatic and Black during the reign of Tsar Simeon I the Great.
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- Tsar Ivan Asen II (1218-1241) was the first Bulgarian ruler, who is known to have minted gold coins with his face.
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- 1396 Bulgaria became part of the Ottoman Empire.
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- “Fish Primer”, written in 1824 by Petar Beron is the first Modern Bulgarian textbook.
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- January 2, 1835 The first Bulgarian secular school was opened in Gabrovo.
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- 1836 The first Bulgarian factory (for textiles) was opened in Sliven.
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- 1860 The first steam mill in the country was built in Svishtov.
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- 1866 The first railway line Ruse-Varna was opened.
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- 1874-1876 The first of its kind indoor bridge in the Balkans was built in Lovech by Nicola Fichev.
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- March 3, 1878 The San Stefano peace treaty was signed which put an end to the Russo-Turkish War and restored the Bulgarian state.
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- 1882 - Franz Milde, helped by a group of enterprising residents of Shumen, started one of the oldest breweries in Bulgaria: Shumensko Pivo.
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- 1897 The first sugar factory of Solvay was opened.
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- 1894-1899 More than 120 industrial enterprises with Bulgarian and foreign funds were established as well as more than 600 km railways were built.1901 – One of the first foreign investments in the country - the shoe polish factory in Ruse, the current Orgachim. 1937 Bulgarian physicist Georgi Nadzakov found the so called photoelectric effect, lately used for the creation of the photocopying equipment. 1954 – Franz Milde, helped by a group of enterprising residents of Shumen, started one of the oldest breweries in Bulgaria: Shumensko Pivo.
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- December 14, 1955 Bulgaria became a member of the UN.
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- 1963 – The petrochemical complex was opened in Burgas – now Lukoil – Neftochim - Bourgas.
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