The church of the 'Holy Wisdom', built in the Byzantine Empire, had been one of the largest religious buildings until 1935, when it was converted into a museum.
The round tower of the largest fort in the Arabian Peninsula had an ingenious defence system.
The Forbidden City is one of the most magnificent and mysterious monuments of imperial China.
The name of this magnificent palace complex originates in Arabic and means 'the red one'.
The Parisian prison became legendary after the Revolution of 1789.
The steam engine, perfected by the Scottish engineer James Watt, revolutionised technology.
The French Montgolfier brothers were the first pioneers of flying.
A type of steam locomotives used by British Railways were manufactured in the 1950s.
A dynamo converts mechanical energy into direct current.
The centre of the Indian mausoleum complex is a white marble tomb built by Shah Jahan for his beloved wife.
In the Tudor Era around 200 buildings were built on the bridge across the River Thames.
The first commercially successful technique of photography was invented by the French Louis Daguerre.
Cannons also appeared in naval warfare.
Legendary geographical discoveries at the beginning of the Modern Age had not only redrawn maps, but also had a truly diverse impact.
One of the best known buildings in the world, this is the residence and office of the President of the United States.
The 900 years old Benedictine abbey is situated in Melk, on the right bank of the Danube.
The Benz Patent-Motorwagen is widely regarded as the first vehicle propelled by an internal combustion engine.
This Pacific island is famous for its unique monolithic human figures.
Napoleon I, who crowned himself emperor, was one of the most outstanding military commanders in history.
Galileo Galilei's scientific achievements contributed greatly to the advancement of physics and astronomy.