Medieval Ruins Under Tesco, Spalena, Nove Mesto, Prague, CZ, 2011

Although Prague has had some human occupants for 250,000 years, and has been a city since about 880 C.E., the Nove Mesto, or New Town, only dates to the 14th Century. Nevertheless, even the New Town has layers of ruins under the streets, as you can see in this construction site on Spalena, behind Tesco's.