Different architectural periods of the city, like a history book, a roll of files, records the vicissitudes of years of a city. The only completely retained the cultural and technological standards of these signs, or with a special human significance of ancient buildings, will make a city's history

A city's Building Department, like a books of history, a record that archive, one of the cities of the innumerable years. Only those who have been carefully preserved culture and science and technology at that time hallmark standards, or have a special cultural significance to the ancient ones, woul

A city each time construction, looks like a history book, a volume file, is recording city vicissitudes years.Only had the integrity to retain these symbol at that time culture and the technical standard, or had the special humanities significance historic building, only then could cause a city the

All periods of building a city, like a history book, a roll of archives, records the vicissitudes of a city. Retained in their entirety only those signs when culture and technology standards, or have special cultural significance of ancient architecture, which makes the city's history stretches in e

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