In the year 1275 we find the first written proof of the existence of the city of Amsterdam.
Around 1300 Amsterdam is granted city rights. Shortly after that the beer trade started with the German city of Hamburg which eventually leads to the development of Amsterdam as a city of trade.
Around 1500 Amsterdam was the most important trade center of Holland. With this development the city itself grew steadily.
Since the area was mostly a swamp area, every city increase was accompanied with the digging of canals.
The dug up material was used for rising the building area and to improve the discharge of water in the area.
Building in swamp area was only possible by using wooden poles as a foundation.