With the strong datum of typically four storeys, Amsterdam has a limited verticality, arising from the historically protected nature of the 16th century buildings. With the potential crisis of food, material and fuel shortages stemming from overpopulation, it seemed interesting to pose the challenge of increased density on an already compact city.

The polemical proposal is a series of urban lighthouses, offering guidance to the lost traveller by colour coded beacon throughout the districts. Taking advantage of the current datum, one can access the upper levels of the light houses for viewing platforms. Thirdly, and most importantly, the towers act as circulation to a new, upper level of the city. A series of platforms have been created above the existing architecture, occupying the same plots, allowing for the preservation of history.