Moscow is a city that arose many centuries ago and has a long history of development. The center of Moscow, the most saturated with various monuments, attractions and other objects attractive to guests and tourists, has preserved the layout of the medieval city. This layout assumes a certain core - fortress, area, castle - and rays diverging from it, held together by several rings. This structure of the city is usually called radial-ring. In modern conditions, such a network of curved and narrow streets makes communication very difficult. Therefore, the best way to see the historical part of our capital is, perhaps, only in the format of a walk.