Title
- On buying and selling1
- On charms and talismans1
- On diphthongs1
- On generation and corruption2
- On interpretation1
- On the calibration of sundials1
- On the eternity of the world1
- Opera3
- Operationes Ihesu Christi1
- Opus pacis1
- Opuscula2
- Opuscula P. Candidi1
- Opusculum de formandis epistolis1
- Opusculum de multiplici ludo1
- Or ha-sekhel and Sefer ha-Shem1
- Oraisons et confessions1
- Oratio ad immortalitatem illustriassimae nec non famigerratissimae laudis1
- Orationes5
- Orationes ; In C. Sallustium Invectiva and Oratio ad Romanos ; In M. Tullium Ciceronem Invectiva.1
- Orations4