The International Council on Monuments and Sites (ICOMOS) is a non-governmental organization with headquarters in Paris, France. Founded in 1965, its role is to promote the application of theory, methodology and scientific techniques to the conservation of the architectural and archaeological heritage. Its work is based on the principles of the 1964 International Charter on the Conservation and Restoration of Monuments and Sites (the Venice Charter).

The specific role of ICOMOS in relation to the Convention includes: evaluation of properties nominated for inscription on the World Heritage List, monitoring the state of conservation of World Heritage cultural properties, reviewing requests for International Assistance submitted by States Parties, and providing input and support for capacity- building activities.

The World Conservation Union (formerly the International Union for the Conservation of Nature and Natural Resources) was founded in 1948 and brings together national governments, NGOs, and scientists in a worldwide partnership. Its mission is to influence, encourage and assist societies throughout the world to conserve the integrity and diversity of nature and to ensure that any use of natural resources is equitable and ecologically sustainable. IUCN has its headquarters in Gland, Switzerland.

The specific role of IUCN in relation to the Convention includes: evaluation of properties nominated for inscription on the World Heritage List, monitoring the state of conservation of World Heritage natural properties, reviewing requests for International Assistance submitted by States Parties, and providing input and support for capacity- building activities.

The International Centre for the Study of the Preservation and Restoration of Cultural Property is an international intergovernmental organization. Established by UNESCO in 1956, with headquarters in Rome, Italy. ICCROM’s statutory functions are to carry out research, documentation, technical assistance, training and public awareness programmes to strengthen conservation of immovable and moveable cultural heritage. ICCROM also provides also expert advice on how to conserve listed properties, as well as training in restoration techniques.

The specific role of ICCROM in relation to the Convention includes: being the priority partner in training for cultural heritage, monitoring the state of conservation of World Heritage cultural properties, reviewing requests for International Assistance submitted by States Parties, and providing input and support for capacity-building activities.