In principle say that tap is a fabulous animal mix of Eagle, lion and snake. The story of how it ended up turning into a valve for the water begins in the Renaissance, when walled castles were changed by lavish residences and appeared huge cathedrals throughout great European city. The problem with flat roofs was the fall of water, which is usually solved with a hole in the charge of the wall that dripping rain on the outside wall, and caused a nasty stain. To avoid that, the architects began to put some pipes protruding one meter of the wall, and then the water already fell away from the walls. For decoration, those tubes had the form of neck and head taps with open mouth came out the liquid, and when the household faucets associated with them is with these forms of drainage by the way in which fell the water jet.