A World Heritage Site is a place inscribed on the UNESCO World Heritage List because it has Outstanding Universal Value — significance that transcends national boundaries and belongs to all humanity. As of 2023 there are 1,157 such sites in 168 countries. This is a short guide from Cultural Heritage Online.
What “Outstanding Universal Value” means
The defining test for World Heritage status is Outstanding Universal Value (OUV): the site must be so exceptional that its loss would impoverish the heritage of all peoples. UNESCO assesses this against ten criteria, approved in 2005 and derived from the original 1972 Convention. A cultural site must meet at least one of criteria (i) to (vi); a natural site, at least one of (vii) to (x); a mixed site, at least one from each group. The criteria cover architectural masterworks, exchanges of human values, testimony to vanished civilisations, stages of Earth’s history, ecological significance, and more.
How inscription works
Inscription is a formal process that typically takes four to ten years:
- Tentative list. The country nominates candidate sites to its national tentative list.
- Nomination file. A full nomination dossier is submitted to UNESCO by 1 February of the year before the decision session.
- Advisory body review. ICOMOS evaluates cultural nominations; IUCN evaluates natural ones. Site visits are conducted.
- World Heritage Committee decision. The 21-member Committee meets each summer and decides: inscribe, defer, refer, or not inscribe.
What designation actually protects
Inscription places a site on the World Heritage List and requires the State Party to protect it under its own laws. UNESCO has no enforcement power: it cannot impose fines or send inspectors with authority to stop work. What it does provide is scrutiny — sites in danger can be added to the “List of World Heritage in Danger,” which creates international reputational pressure — and access to the World Heritage Fund for technical assistance. The real protection comes from the national legal and planning framework the country puts in place.
Italy’s position
Italy has 58 World Heritage Sites, more than any other country. The first inscriptions came in 1979 (Rock Drawings in Valcamonica; Historic Centre of Rome; Church and Dominican Convent of Santa Maria delle Grazie). The most recent is the Po Delta in 2025. The sites span ancient ruins, Renaissance cities, Baroque landscapes, industrial heritage, and Alpine geology. CHO documents many of them with sourced editorial cards and GPS: explore them on the interactive map.
Frequently Asked Questions
What is a World Heritage Site?
A World Heritage Site is a place inscribed on the UNESCO World Heritage List because it has Outstanding Universal Value — significance so exceptional that its loss would affect all humanity, not just the country where it stands. There are 1,157 such sites (2023) covering cultural, natural, and mixed properties.
How does a place get inscribed as a World Heritage Site?
The country where the site is located nominates it, submits a detailed dossier to UNESCO, and submits to review by the advisory bodies ICOMOS (for cultural sites) or IUCN (for natural sites). The 21-member World Heritage Committee then votes, typically four to ten years after the initial nomination. The site must demonstrate Outstanding Universal Value against at least one of the ten criteria.
How many World Heritage Sites are there?
As of the 2023 World Heritage Committee session, there are 1,157 World Heritage Sites: 900 cultural, 218 natural, and 39 mixed, spread across 168 countries. Italy leads by country with 58.
Does UNESCO protect World Heritage Sites directly?
No. UNESCO has no enforcement powers within member states. Inscription requires the state to protect the site under its own laws. UNESCO can apply pressure by adding at-risk sites to the List of World Heritage in Danger, and can provide technical and financial assistance through the World Heritage Fund, but the legal protection is the state’s responsibility.
Sources used in this article
- UNESCO — Operational Guidelines for the Implementation of the World Heritage Convention (criteria).
- UNESCO — Nomination procedure.
- UNESCO — Italy on the World Heritage List (58 sites).
- CHO magazine — Cultural vs natural heritage: what is the difference?
- CHO — Interactive heritage map.
