Author
- Council of Basel1
- Cristoforo di Guidantonio de Piccolomini1
- De Lazara, Nicoló1
- Del Carretto1
- Diogenes Laërtius1
- Diogenes of Sinope1
- Domenico Cavalca1
- Dominican Order1
- Domizio Calderini1
- Donato Acciaioli1
- Duchy of Milan1
- Duns Scotus1
- Durandellus1
- Eberhard of Béthune1
- Edward IV of England1
- Einhard1
- Engelbert of Admont1
- Enguerrand de Monstrelet1
- Ephrem the Syrian1
- Euclid1