Zither

A zither is one of the typical instruments of Hungarian folk music, played by strumming or plucking the strings.

Arab Caliph (7th century)

Caliphs, considered successors of the Prophet Muhammad, were the most important religious leaders of Islam.

Persian monarch (5th century BC)

Ancient Persian monarchs were famous for the size of their empire and their wealth.

American soldier (World War II)

American soldiers fought in almost all major theatres of World War II.

European ground squirrel

Subterranean rodents widespread in Central- and Eastern Europe.

Four colour theorem

Colour a map with the fewest number of colours possible, so that no two adjacent regions have the same colour.

The development of automobiles

Automobiles have evolved a lot since the late 19th century.

The development of freight transport

This animation demonstrates the development of freight transport, from horse-drawn carts to modern lorries.

Arch of Titus (Rome, 1st century)

The Arch of Triumph was built at the entrance of the Forum Romanum, to commemorate Emperor Titus’ victory in the Siege of Jerusalem.

British soldier (World War I)

During World War I, Britain was part of the military alliance called the ´Triple Entente´.

Seas and bays

This animation demonstrates the most important seas and bays.

German soldier (World War II)

Soldiers of the Wehrmacht in World War II were well-trained and well-equipped with modern weapons.

Farm (Hungary, 19th century)

Small farms usually located near the border of rural towns, inhabited by peasants.

Solids of revolution (exercise)

An exercise about the generation of solids of revolution.

Euler's polyhedron formula

The theorem formulated by Leonhard Euler describes one of the basic properties of convex polyhedra.

Conic solids

This animation demonstrates various types of cones and pyramids.

Angle of inclination of lines and planes

This animation demonstrates the angle of inclination of lines and planes in various positions.

Drums

Drums are played by hitting the membrane. There are many versions of drums.

Medieval towers and bastions

The structure of fortresses developed together with military technology.

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