The publication may also be distributed here under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license. More information can be found on the University of Groningen website: https://www.rug.nl/library/open-access/self-archiving-pure/taverneamendment. 'Outstanding Universal Value' (OUV), or that were 'so exceptional as to transcend national boundaries and to be of common importance for present and future generations of all humanity' (UNESCO 2019a, p.20). This convention (UNESCO 1972) followed the successful UNESCO campaigns to: relocate the Abu Simbel and Philae temples in Egypt to protect them from being flooded due to the construction of the Aswan High Dam; protect the historic city of Venice, Italy from flooding; rebuild the Borobudur temple compound in Indonesia; and protect the archaeological ruins of Moenjodaro in Pakistan from saline degradation due to a rise of the water level of the Indus River (UNESCO 2021c). The World Heritage Convention slowly became one of the most successful UN conventions after it entered into force on 17 December 1975, Maritime Mercantile City, see Box 1.