Competing with each other in the 19th and 20th centuries, the world´s most powerful nations made great efforts to develop effective firearms.
African tribes have their own distinct cultures.
Wines of the Tokaj wine-growing region are well known worldwide.
Colour a map with the fewest number of colours possible, so that no two adjacent regions have the same colour.
Automobiles have evolved a lot since the late 19th century.
American soldiers fought in almost all major theatres of World War II.
Ancient Persian monarchs were famous for the size of their empire and their wealth.
Medieval kings were typically depicted sitting on their thrones, wearing a crown and the Royal regalia.
Caliphs, considered successors of the Prophet Muhammad, were the most important religious leaders of Islam.
This animation demonstrates the relative position of lines and planes.
This animation demonstrates the angle of inclination of lines and planes in various positions.
The screw pump commonly attributed to Archimedes made irrigation much more effective
This animation demonstrates the states and largest cities of the USA.
The Arch of Triumph was built at the entrance of the Forum Romanum, to commemorate Emperor Titus’ victory in the Siege of Jerusalem.
Ancient Greek heavy infantryman.
The battle, that is considered to be a tactical masterpiece, meant a decisive victory for Alexander the Great against Persia.
The Altar of Peace, commissioned during the reign of Augustus, was one of the most important works of ancient Roman art.
Soldiers of the Wehrmacht in World War II were well-trained and well-equipped with modern weapons.
Drums are played by hitting the membrane. There are many versions of drums.
An exercise about the generation of solids of revolution.