Royal institute

• Chatham House
• Grand Ducal Institute
• KNMI (institute)
• Liverpool Royal Institution
• Royal Anthropological Institute of Great Britain and Ireland
• Royal Archaeological Institute
• Royal Architectural Institute of Canada
• Royal Australian Chemical Institute
• Royal Australian Institute of Architects
• Royal Australian Institute of Architects Gold Medal
• Royal Belfast Academical Institution
• Royal Belgian Institute of Natural Sciences
• Royal Black Institution
• Royal Canadian Institute
• Royal Cork Institution
• Royal Institute for Deaf and Blind Children
• Royal Institute of British Architects
• Royal Institute of Chemistry
• Royal Institute of Navigation
• Royal Institute of Oil Painters
• Royal Institute of Painters in Water Colours
• Royal Institute of Philosophy
• Royal Institute of Technology
• Royal Institute of Thailand
• Royal Institute of the Amazigh Culture
• Royal Institute of the Architects of Ireland
• Royal Institution
• Royal Institution of Chartered Surveyors
• Royal National Institute for Deaf People
• Royal National Institute of Blind People
• Royal National Lifeboat Institution
• Royal New Zealand Institute of Horticulture
• Royal Scottish Academy
• Royal Town Planning Institute
• Royal United Services Institute