What parts did Russian cities consist of in the 15th-16th centuries? What was the city itself? What was its main purpose?

Cities were built with wooden or earthen fortifications. City walls or ramparts were bordered by ditches of various depths and widths, into which water was led or piles studded with iron spokes were driven. Administrative buildings were located outside the inner walls of the city. First of all, an order hut was set up, where the administration of the city was concentrated. A church was erected without fail. Near the clerk hut was the governor’s yard. A cellar was built for storing gunpowder, behind it was a cannon barn with bullets, cannonballs and weapons. Lead for their manufacture was also stored here. The sovereign’s granary was located in the city, from where the sovereign’s grain salary was distributed to the servants. Outside the city walls, in a wooden hut, dug into the ground and fenced off by a fence (fence), there was a prison. The dwellings of the archers were located not far from the city fortifications. Finally, there were courtyards in the city of landowners who had estates in the city’s environs. They were built in case of then frequent hostilities. In peacetime, landowners did not live in the city, leaving houses in the care of special people – janitors. There were also state-owned (i.e. state-owned) siege huts built for the surrounding common people in case of wartime. Trading yards were located in large cities. In this case, the city became not only an administrative, but also a pro vym center.