The Centre for Humanitarian Dialogue (HD), otherwise known as the Henry Dunant Centre for Humanitarian Dialogue, works to prevent and resolve armed conflicts around the world through mediation and discreet diplomacy. A non-profit organisation based in Switzerland, HD was founded in 1999 on the principles of humanity, impartiality and independence. HD is supervised by an independent board, regularly reports to donors and undergoes financial audits every year.

The Oslo Forum convenes senior conflict mediators, high level decision makers, key peace process actors, analysts and experts in an informal and discreet retreat to share their experiences, identify challenges and reflect on mediation practice." The retreat is held annually in June in Oslo, Norway, and is co-hosted by the Royal Norwegian Ministry of Foreign Affairs and the Centre for Humanitarian Dialogue (HD), a private diplomacy organisation based in Switzerland. Participation is by invitation-only. All discussions take place under the Chatham House Rule.