Art is attractive, people like pursue it all the time. From ancient to modern the idea of the buliding from the door is continue.
There are two types of door decoration for the art. One is to extract the door from the building structure, and further develop its aesthetic expression.The other is the door itself is used for the decoration of the building, the door attached to the building.
The advantage of the door is symmetry, which is the door-shaped building aesthetic basis. The vast majority of door-shaped buildings are imitated door frames. Door frame is variety, from the structure point of view, voucher arc and beam type. The coupon door is a symbol of ancient Rome, it is well-known by the small Saarinen design of the United States of America St. Louis City Memorial Arch, which uses the same Eiffel Tower foot arc shape. The ancient Greek doors are beam type, the most famous is Paris, France, the Défense door