An auditorium is a room built to enable an audience to hear and watch performances. For movie theatres, the number of auditoria (or auditoriums) is expressed as the number of screens. Auditoria can be found in entertainment venues, community halls, and theaters, and may be used for rehearsal, presentation, performing arts productions, or as a learning space.
A keystone is a wedge-shaped stone at the apex of a masonry arch or typically a round-shaped one at the apex of a vault. In both cases it is the final piece placed during construction and locks all the stones into position, allowing the arch or vault to bear weight. In arches and vaults, keystones are often enlarged beyond the structural requirements and decorated. A variant in domes and crowning vaults is a lantern.
A medallion is a carved relief in the shape of an oval or circle, used as an ornament on a building or on a monument. Medallions were mainly used in the 18th and 19th centuries as decoration on buildings. They are made of stone, wood, ceramics or metal.
Hristo Stoyanov Kovachevski (November 14, 1860 - November 9, 1949) was a Bulgarian architect. He was born on November 14, 1860 in Kyustendil. He received his primary education in his hometown. Inspector in the Ministry of Public Buildings, Roads and Public Works (1893), later Head of the Architecture Department. He designed and supervised the construction of the boys' high school in Ruse (1893), the girls' high school in Veliko Tarnovo, the metropolitan in Varna, etc. Architect for maintenance of the Euxinograd Palace and Park (1900). Co-founder of the Varna Archaeological Society at the beginning of June 1902.
The First World War began on July 28, 1914, and lasted until November 11, 1918. It was a global war and lasted exactly 4 years, 3 months, and 2 weeks. Most of the fighting was in continental Europe. Soldiers from many countries took part, and it changed the colonial empires of the European powers. Before World War II began in 1939, World War I was called the Great War, or the World War. Other names are the Imperialist War and the Four Years' War. There were 135 countries that took part in the First World War, and nearly 10 million people died while fighting. Before the war, European countries had formed alliances to protect themselves. However, that made them divide themselves into two groups. When Archduke Franz Ferdinand of Austria was assassinated on June 28, 1914, Austria-Hungary blamed Serbia and declared war on it. Russia then declared war on Austria-Hungary, which set off a chain of events in which members from both groups of countries declared war on each other.
The 1944 Bulgarian coup d'état, also known as the 9 September coup d'état, was the forcible change of the government of Kingdom of Bulgaria carried out on the eve of 9 September 1944. In Communist Bulgaria it was called People's Uprising of 9 September - on the grounds of the broad unrest, and Socialist Revolution - as it was a turning point politically and the beginning of radical reforms towards socialism.
