Moscow has a history of chaotic periods of war that ended with the destruction of a once largely wooden city and the building ofa new city on top ofthe rubble ofthe old.The result is a layered city, with each tier holding information about a part of Russia’s past.In some areas of the city,archaeologists have reached the layer from 1147, the year of Moscow’s founding.Among the findings from the various periods ofMoscow’s history are carved bones,metal tools,pottery,glass,jewelry, and crosses.From the passage,the reader can infer that