The Convention obliges states parties to identify, protect and transmit cultural and natural heritage of outstanding universal value, and establishes the World Heritage List, the intergovernmental Committee and the Fund. Inscription requires legal protection, a delimited buffer zone and a management plan, and compliance is policed through reactive monitoring, the List of World Heritage in Danger and the ultimate sanction of deletion. Historic towns and urban ensembles became one of the largest categories, and the 2011 Recommendation on the Historic Urban Landscape extended the frame from monuments to urban form, skyline and setting.
It placed an international layer of development control over hundreds of historic cities, turning skyline, bridge, tower and infrastructure decisions into questions of treaty compliance negotiated with Paris rather than settled locally. The deletions of Dresden's Elbe Valley in 2009 and Liverpool's waterfront in 2021 showed both the reach of the instrument and the willingness of cities to trade listing for development.
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