It is considered an outstanding example of a historic city and [[UNESCO]] selected it as a [[World Heritage Site]] in 1992 on the basis that it exhibited "an important interchange of human values, over a span of time or within a cultural area of the world, on developments in architecture or technology, monumental arts, town-planning or landscape design;" and represented "an outstanding example of a traditional human settlement... which is representative of a culture, or human interaction with the environment especially when it has become vulnerable under the impact of irreversible change."<ref>''The Criteria For Selection'' [http://whc.unesco.org/en/criteria/ UNESCO]. Accessed 13 January 2008.</ref> | It is considered an outstanding example of a historic city and [[UNESCO]] selected it as a [[World Heritage Site]] in 1992 on the basis that it exhibited "an important interchange of human values, over a span of time or within a cultural area of the world, on developments in architecture or technology, monumental arts, town-planning or landscape design;" and represented "an outstanding example of a traditional human settlement... which is representative of a culture, or human interaction with the environment especially when it has become vulnerable under the impact of irreversible change."<ref>''The Criteria For Selection'' [http://whc.unesco.org/en/criteria/ UNESCO]. Accessed 13 January 2008.</ref> |