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- Rachofsky House (1 artworks) – Dallas, TX, USA – artworks
- Radishchev State Art Museum (2 artworks) – Saratov, Russia – artworks
- Ragley Hall (1 artworks) – Alcester, UK – artworks
- Ranger's House - Wernher Collection (0 artworks) – London, UK
- Rautenstrauch-Joest Museum (0 artworks) – Cologne, Germany
- Real Academia de Bellas Artes de San Carlos (2 artworks) – Valencia, Spain – artworks
- Real Academia de Bellas Artes de San Fernando (17 artworks) – Madrid, Spain – artworks
- Real Monasterio de Nuestra Senora de Guadalupe (1 artworks) – Guadalupe, Spain – artworks
- Red Lodge Museum (0 artworks) – Bristol, UK
- Redwood Library and Athenaeum (1 artworks) – Newport, RI, USA – artworks
- Reformed Congregation of Vámospércs (1 artworks) – Vámospércs, Hungary – artworks
- Regional Art Gallery in Liberec (1 artworks) – Liberec, Czech Republic – artworks
- Regional Museum of Messina (1 artworks) – Messina, Italy – artworks
- Rembrandthuis (1 artworks) – Amsterdam, Netherlands – artworks
- Renaissance Society at the University of Chicago (1 artworks) – Chicago, IL, USA – artworks
- René Magritte Museum (0 artworks) – Brussels, Belgium
- Residenz Würzburg (9 artworks) – Würzburg, Germany – artworks
- Residenzgalerie Salzburg (13 artworks) – Salzburg, Austria – artworks
- Residenzmuseum (1 artworks) – Munich, Germany – artworks
- Révay Collection (1 artworks) – Nagykőrös, Hungary – artworks
- Rheinisches Landesmuseum (1 artworks) – Bonn, Germany – artworks
- Rhode Island School of Design Museum (12 artworks) – Providence, RI, USA – artworks
- Richmond Art Museum (0 artworks) – Richmond, IN, USA
- Richter Collection (0 artworks) – Zagreb, Croatia
- Rijksmuseum (458 artworks) – Amsterdam, Netherlands – artworks
- Rijksmuseum Twenthe (13 artworks) – Enschede, Netherlands – artworks
- Ringling Museum of Art (19 artworks) – Sarasota, FL, USA – artworks
- Rippl-Rónai Museum (19 artworks) – Kaposvár, Hungary – artworks
- Robert McLaughlin Gallery (0 artworks) – Oshawa, Canada
- Rochdale Art Gallery (2 artworks) – Rochdale, UK – artworks
- Rochester Art Center (0 artworks) – Rochester, MN, USA
- Rockoxhuis (38 artworks) – Antwerp, Belgium – artworks
- Römisch-Germanisches Museum (0 artworks) – Cologne, Germany
- Rose Art Museum of Brandeis University (3 artworks) – Waltham, MA, USA – artworks
- Royal Academy of Arts (8 artworks) – London, UK – artworks
- Royal Albert Memorial Museum and Art Gallery (1 artworks) – Exeter, UK – artworks
- Royal Castle in Warsaw (2 artworks) – Warsaw, Poland – artworks
- Royal Collection (198 artworks) – Windsor, UK – artworks
- Royal Collection - Buckingham Palace (43 artworks) – London, UK – artworks
- Royal Collection - Hampton Court (5 artworks) – London, UK – artworks
- Royal Collection - Kensington Palace (2 artworks) – London, UK – artworks
- Royal College of Surgeons of England (2 artworks) – London, UK – artworks
- Royal Library of Belgium (4 artworks) – Brussels, Belgium – artworks
- Royal Museum of Fine Arts (148 artworks) – Antwerp, Belgium – artworks
- Royal Museum of Fine Arts (141 artworks) – Brussels, Belgium – artworks
- Royal Palace (1 artworks) – Amsterdam, Netherlands – artworks
- Rubell Family Collection (4 artworks) – Miami, FL, USA – artworks
- Rubens House (Rubenshuis) (4 artworks) – Antwerp, Belgium – artworks
- Russell-Cotes Art Gallery and Museum (1 artworks) – Bournemouth, UK – artworks
- Russian Museum (201 artworks) – St. Petersburg, Russia – artworks
