Author
- Cornelius Nepos1
- Cristoforo di Guidantonio de Piccolomini1
- Cyriacus, Bishop of al-Bahnasā1
- Daffyd ap Philip1
- Damasus I1
- David Crychton1
- David Kimhi1
- David of Augsburg1
- De Lazara, Nicoló1
- Diego de San Pedro1
- Dieudonné Cabanier1
- Dimitrios Chalkokondyles1
- Diodorus Siculus1
- Diogenes of Sinope1
- Domenico Oliva1
- Donato Acciaioli1
- Dorotheus of Gaza1
- Duchy of Milan1
- Duchy of Parma and Piacenza1
- Eadmer1