• RA = Royal Academy of Arts (London)
• RABASF = Real Academia de Bellas Artes de San Fernando (Madrid)
• RCHRP = Hampton Court Palace (London)
• RCT = Royal Collection Trust (UK)
• RIJKS = Rijksmuseum (Amsterdam)
• RISD = Rhode Island School of Design (Providence)
• RS = Royal Society (London)
• RSA = Royal Society of Arts (London)