| Reinhard, abbot of Reinhausen |  | A letter from Elisabeth of Schoenau () 
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    | Reynold Alardi |  | A letter from Eleanor of Provence (01/31/1254) 
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    | Richard Altemir | A letter to Almodis of La Marche (1058) A letter to Almodis of La Marche (1061, April 28)
 
 | A letter to Richard Altemir 
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    | Richard I, King of England | A letter to Eleanor of Aquitaine (1193) A letter to Eleanor of Aquitaine (1193)
 A letter to Eleanor of Aquitaine (1193, April 19)
 A letter to Marie of France, countess of Champagne and Troyes
 
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    | Richard of Cornwall | A letter to Henry III (1254) A letter to Henry III (1254)
 
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    | Richard, king of England |  |  |  | 
    
        
    | Richild |  | A letter from Caesaria, abbess of Arles (c.550) 
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    | Robert |  |  |  | 
    
        
    | Robert and Seith and other nuns |  | A letter from Anselm, archbishop of Canterbury (1106-09) 
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    | Robert d'Arbrissel | A letter to Ermengarde of Anjou, countess of Brittany (c.1109) 
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    | Robert de Cadamo |  | A letter from Eleanor of Provence (05/10/1254) 
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    | Robert de Dacre |  | A letter from Eleanor of Provence (03/24/1254) 
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    | Robert Grosseteste | A letter to Eleanor of Provence (1244?) 
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    | Robert I of Artois | A letter to Blanche of Castile, queen of France (1249) 
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    | Robert II, count of Flanders | A letter (?1112, May 27) A letter to Clementia of Burgundy, countess of Flanders (1096)
 A letter to Public
 A letter to Public (1106, September 15)
 A letter to Public (1109, June 28)
 A letter to Public (1110)
 A letter to The faithful (1095-96)
 A letter to The faithful (1096)
 A letter to The faithful (1107, March 21)
 A letter to The faithful (1110)
 A letter to The faithful (1110, July 13.)
 A letter to The faithful (1110, July 27)
 
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    | Robert le Vavassur |  | A letter from Eleanor of Provence (01/28/1254) 
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    | Robert of Artois |  |  |  | 
    
        
    | Robert, Edith and other nuns |  |  |  | 
    
        
    | Roger and Raymond Batallia | A letter to Rangard of La Marche (1063, January 23) 
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    | Roger, Count of Foix | A letter to Bernard Ato IV (1095, April 21) 
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    | Roger, count of Foix | A letter to Bernard Ato IV (1095, April 22) A letter to Bernard Ato IV (1095, April 22)
 A letter to Bernard Ato IV (1125, March 31)
 A letter to Bernard Ato IV (1125, March 31)
 
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    | Roland of Bisan | A letter to Bernard Ato IV (1127, April 18) 
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    | Roland William of Voltrera | A letter to Almodis of La Marche (1067) 
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    | Roland, abbot of Moustier-Ramey | A letter to Blanche of Navarre, Countess of Champagne (1209-10, March) 
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    | Roman Senate |  | A letter to the Senate of Rome 
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