Former Owner
- Prospero Caffarelli1
- R. Tolentino1
- Ramsau Monastery1
- Raoul Chandon de Briailles1
- Raoul Léonor Lignerolles1
- Richard McKeon1
- Robert Brodhead Honeyman1
- Robert Garrett1
- Robert Rossiter Hutton1
- Robert Samuel Turner1
- Roy G. Fitzgerald1
- Royal Monastery of Saint Mary of Guadalupe1
- Rudolf Busch1
- Rudolphus Rasser Donatus1
- Samuel Butler1
- Samuel H. Putnam1
- Samuel Putnam Avery1
- Santa Caterina1
- Santi Bonifacio e Alessio1
- Santi Giovanni e Paolo1