muhammad (pbuh) had built in a barren desert a unique cultural system that was never known before. it was distinguished with the accuracy of planning and observing the interest of the city all in a beautiful & attractive view. the mosque was in the center of the capital and it was the headquarters for running the city and the conference center for people during important events and emergencies. such center (the mosque) was the refuge for the poor & needy, where the state and the charitable bodies provide for them food and shelter. also it was the shelter for the strangers who come from outside the state where they find food and hostel.
the civilization system built by muhammad (pbuh) depended on establishing markets & houses around the mosque to facilitate the transaction between people of the markets and those of the houses from one side and to facilitate their contact with the mosque from the other side. the people in the city of muhammad (pbuh) are one entity always in contact; everyone is in the centre of the events with no discrimination or suppression.