Above you only the velvety sky. In the city you rarely have such a clear view of the stars: the smog, the light, the high buildings... From the lookout of the tower you can distinguish the stars of the northern hemisphere as clearly as could the Babylonians, Maya, Egyptians, Chinese and Indians, who recorded regular patterns in the star-lit sky in order to predict future events. Imaginary lines help to recognize and locate stars in their constellations. Twelve constellations will lead you to different destinations: travels of intellectual adventurers, expeditions of expansionists, and escapist projects of colonialists.