Architecture as the name suggests one can understand and refer it to an art of planning a building and also different building styles seen throughout the history. The main architectural features consist of the roof, arches, walls, windows and doors of the building. An architect is a professional who designs a building and overseas its constructions. Until recently architectures drew large numbers of plans to instruct the builders and engineers but these days much of work is carried out on computer. The style and traditional architectural styles of Asia and Middle East remained the same for the centuries. Classical architecture that of the ancient Romans and Greeks. In ancient days the styles of buildings were determined by the climatic conditions, the availability of materials and local builders. Helped by better technology architects turned to glass, steel and concrete to express their vision of modern architecture.