Near the south gate of the Guild area in the City of Knowledge, there is a special area. This area covering about three kilometers, is a flat, open space. The ground is carefully paved with white marble. Although you can see the cracks between the stones with your naked eye, you absolutely can't feel any unevenness when you touch it by hand. Around this marble ground, high walls enclose a semi-sealed area, with only one door of special material blocking the way outside. It only opens when necessary.
Outside the gate is another small square with a circle of various shops around it: restaurants, cafes, grocery stores, general stores, and so forth, available for those passing by to use. On the seemingly unremarkable square, however, tens of people often gather, waiting for the gate to open.
