Typical working-class districts with unhealthy living conditions were built at the time of the Industrial Revolution.
A wide variety of torture devices were in use in medieval dungeons.
These excellent shipbuilders and sailors travelled great distances on the seas and rivers.
The cannon was an important type of firearms at the beginning of modern history, widespread both on land and water.
Medieval Venice owed its wealth to its flourishing maritime trade.
The work of smiths – one of the first professions in history – became even more important in the Middle Ages.
Farming techniques evolved with the development of human civilisation in the Middle Ages and the Modern Age.
The inability to differentiate certain shades of colour is called colour vision deficiency.
Machines powered by animals were mainly used in mills, for grinding grains.
The Olympic Games, held in the town every 4th year after 776 BC made it one of the centres of ancient Greece.
The suspension bridge that stretches above the strait between San Francisco Bay and the Pacific Ocean was opened in 1937.
Archimedes was one of the most brilliant Greek scholars of ancient times, who made his mark with military inventions as well.
The city with advanced culture was the first settlement in history to have a citadel.
Ancient Roman conquerors had effective siege engines developed for attacking fortifications.
As the Roman Empire expanded, military camps were established on the newly conquered territories.
This animation presents the states and state capitals of Germany
The animation presents the main air, water and land routes and transport hubs.
This animation presents the states and state capitals of Austria.
Building 3D shapes into a given cube mesh with the help of several views.
The changing bicycle, at first mocked as a toy, is a true mirror of the technical development over the last three centuries.