UNESCO World Heritage Category Reference

What the criteria are for

To join the World Heritage List, a place must demonstrate Outstanding Universal Value by satisfying one or more of ten selection criteria. The criteria are the lens through which the World Heritage Committee judges nominations — they turn a vague sense that somewhere is “special” into a defensible, comparable standard used by every member state since the 1972 World Heritage Convention.

How it works

The ten criteria split cleanly into two groups. Criteria (i) to (vi) are cultural and cover human creativity, exchange of ideas, testimony to civilizations, architectural significance, traditional settlements, and association with events or beliefs. Criteria (vii) to (x) are natural and cover natural beauty, Earth’s geological history, ongoing ecological processes, and biodiversity.

Cultural   (i)   (ii)  (iii) (iv)  (v)   (vi)
Natural    (vii) (viii)(ix)  (x)

Cultural site  →  meets only i–vi
Natural site   →  meets only vii–x
Mixed site     →  meets at least one of each group

A nomination dossier states exactly which criteria are claimed, and the advisory bodies (ICOMOS for cultural, IUCN for natural) assess whether the evidence supports each one.

What each criterion captures

The six cultural criteria each address a distinct kind of human achievement:

• (i) A masterpiece of human creative genius — think the Taj Mahal or the Sydney Opera House.
• (ii) An interchange of human values over time or across cultures — the Silk Roads trade routes exemplify this.
• (iii) Unique or exceptional testimony to a living or disappeared civilization — Pompeii, preserved under volcanic ash, is a textbook case.
• (iv) An outstanding example of a type of building, architectural ensemble, or technological ensemble — Versailles or the works of Antonio Gaudí.
• (v) An outstanding example of a traditional human settlement or land-use that represents a culture (especially when it has become vulnerable) — the rice terraces of the Philippine Cordilleras.
• (vi) Direct or tangible association with events, living traditions, ideas, or beliefs of outstanding universal significance — Hiroshima Peace Memorial.

The four natural criteria focus on the physical world:

• (vii) Superlative natural phenomena or exceptional natural beauty — the Grand Canyon.
• (viii) Outstanding examples representing the major stages of Earth’s history, including geological processes — the Jurassic Coast of England.
• (ix) Outstanding examples representing significant ongoing ecological or biological processes — the Galápagos Islands.
• (x) The most important natural habitats for in-situ conservation of biological diversity — the tropical forests of Sumatra.

Mixed sites and multiple criteria

A single criterion is enough for inscription, but many famous sites meet several — the Great Barrier Reef satisfies all four natural criteria simultaneously. A mixed site must meet at least one cultural and at least one natural criterion; Machu Picchu and the Dolomites are examples.

Reading inscription records and historical documents

When you read an inscription record, the criteria appear in parentheses immediately after the site name: “(i)(iii)(vi)” tells you the site was inscribed purely on cultural grounds. Remember the important 2005 renumbering: before 2005 there were two separate lists, each starting from (i). A pre-2005 “natural criterion (i)” corresponds to today’s criterion (vii), so older references can cause confusion unless you check the publication date. The merger into a single sequence of ten was adopted to simplify cross-comparison between cultural and natural values.