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The theorem formulated by Leonhard Euler describes one of the basic properties of convex polyhedra.
Slavic warriors were greatly respected throughout Europe in the Middle Ages.
The Rietveld Schröder House, located in the town of Utrecht in the Netherlands, can be considered a forerunner of modern houses.
The Roman army, led by Flavius Aetius, stopped the Hun invasion led by king Attila
It is an alcaloide found in coffee, tea and kola nuts.
The Orthodox church, situated on a picturesque cliff, was named after John the Apostle
This scene presents a folk costume characteristic of Bulgaria's northern ethnographic region.
This animation presents the current refugee crisis from various points of view.
The Mir Castle Complex, situated in the town of Mir, Belarus was built in the Gothic-Renaissance style.
Learn the concept of colours, numbers, letters and shapes while playing.
Codeine is one of the most significant alkaloids of opium used to treat pain.
Morphine is one of the most significant alkaloids of opium used to treat pain.
Pharaoh Thutmose III defeated the rebellious coalition of Canaanite vassal states led by the king of Kadesh.
In the battle fought at the shores of Hellas, Octavian won a decisive victory over Marcus Antonius.
The battle, that is considered to be a tactical masterpiece, meant a decisive victory for Alexander the Great against Persia.
In this battle, Simeon I won a great victory over the Byzantine army.
The magnificent mausoleum was commissioned by Timur, the legendary conqueror.