The definition of a building is as follows: structures built on several storeys. There are many different types of buildings, depending on their purpose and architecture. The “high rise” is a very tall building, and, on the contrary, there are also “low rise” buildings that stretch horizontally on the ground.

There are also different types of buildings depending on their purpose. Therefore, there are apartment buildings, office buildings, and so on. The tallest buildings are called skyscrapers, and a body is in charge of listing and classifying them following some strict standards, and taking into account the architectural structure, not the possible antennas that might have been added to the roofs.

Buildings saw the light some centuries ago, so as to gain space, especially in the Unite-States. Likewise, most of the buildings at the time were only meant to be office buildings for companies and governmental agencies. Only later did apartment buildings come into existence. Indeed, space was expensive and rare especially in cities which attracted more and more people. Unlike countryside where houses are still predominant, in cities, houses are very rare. Apartments superposition enables to gain space, which would be impossible otherwise.

It usually takes a few months (and in some cases even years) to make a building. Some of them are listed as cultural heritage.