Author
- Ricardus, de Mediavilla, approximately 1249-1308?1
- Richard de Geveldale1
- Robert de Gretham1
- Roger Bigod, 2nd Earl of Norfolk1
- Rogerius1
- Rolandino de' Passaggeri1
- Roman Catholic Archdiocese of Reims1
- Sancho IV of León and Castile1
- Siena1
- Stephen Langton1
- Theobaldus Episcopus1
- Thomas of Cantimpré1
- Titus Livius1
- Veruela Abbey1
- Wace1
- Walerand ap Adam1
- Walter of Châtillon1
- William Perault1
- William Rothwell1
- William de Brailes1