After the structure of temples in the ancient Greece, the another significant orders were urban planning. The Greek people formed the cities called polis and acropolis that have an important in terms of architecture. Acropolis refers to the ‘upper town’ of any Greek city. The majority of the Greek cities were built on hills and the acropolis. It was the centre of religious and political life. In these days, there were some rules to compose the settlement of the city. One of them was the large open space for the people in the public center. When analyzed as a whole, there is a orthogonal planning in cities of Greek. This is also called ‘grid plan’. The grid provided a straightforward way to divide the land shape the structure of the city. It was purposed that the placement of sites dedicated to public life and sacred space, was to be used for housing. Hippodamus first applied to his home city the grid plan which he had developed on inspiration from geometrically designed settlement, and that later many cities were laid out according to this plan. Mietus, which is a fine example of the grid plan, comprises houses on blocks created by streets and side streets crossing at right angles, with public buildings in the city centre. The Hippodamian who applied the grid system divided into three categories to the city. These are sacred, private and public.
Stoa is a Greek architectural term that describes a covered walkway or colonnade that was usually designed for public use. It was described as ‘marketplace’ in Greek agora. The agoras of the Miletus are defined by stoas in terms of some aspects. Stoas became elements of a design, making open space formal and monumental without enclosing it.