| 2501 | BRUO1.4 | Bruno, Giordano | Opere complete IV. De l`infinito, universo e mondi | da |
| 2502 | MUR1.2 | Murano, Giovanna | Opere diffuse per exemplar e pecia | da |
| 2503 | ROS3.1.1 | D.D. Roşca | Opere filosofice (I) | da |
| 2504 | ROS3.1.2 | D.D. Roşca | Opere filosofice (II) | da |
| 2505 | SEX1.1.1 | Sextus Empiricus | Opere filozofice vol.I | da |
| 2506 | PLA1.18.1 | Platon | Opere I | da |
| 2507 | PLA1.18.2 | Platon | Opere II | da |
| 2508 | PLA1.18.3 | Platon | Opere III | da |
| 2509 | PLA1.18.4 | Platon | Opere IV | da |
| 2510 | PLA1.18.5 | Platon | Opere V | da |
| 2511 | BAC1.2 | Roger Bacon | Opus maius | da |
| 2512 | SYN1.1 | Synesius Cyrenensis | Opuscula | da |
| 2513 | AUS1.1 | Ausonius | Opuscula | da |
| 2514 | CEL2.1 | Conradus celtis | Opuscula | da |
| 2515 | PLE1.5 | Georgius Gemistus Plethon | Opuscula de historia graeca (ed. Maltese) | da |
| 2516 | GRO1.3 | Robert Grosseteste | Opuscula philosophica (ed. L. Baur) | da |
| 2517 | POR2.1 | Porphyrius | Opuscula Selecta | da |
| 2518 | PLE1.1 | Georges Gémiste Pléthon | Oracles Chaldaiques | da |
| 2519 | CIC1.14 | Marcus Tullius Cicero | Oratio pro Murena | da |
| 2520 | CIC1.17 | Marcus Tullius Cicero | Oratio pro P. Sestio | da |
| 2521 | CIC1.18#1 | M. Tullius Cicero | Orationes | da |
| 2522 | CIC1.18#2 | M. Tullius Cicero | Orationes | da |
| 2523 | AND1.1 | Andocide | Orationes | da |
| 2524 | DEM2.2.1 | Demosthenes | Orationes I | da |
| 2525 | DEM2.1.1 | Demosthenes | Orationes I (I-XIX) | da |
| 2526 | DEM2.1.2 | Demosthenis | Orationes II (XX-XL) | da |
| 2527 | DEM2.3.2.1 | Demostenes | Orationes II, pars I, (XX-XXIII) | da |
| 2528 | DEM2.1.3 | Demosthenis | Orationes III (XLI-LXI) | da |
| 2529 | CIC1.16 | M. Tullius Cicero | Orationes post reditum | da |
| 2530 | HYP1.1 | Hyperidus (ed. f. Blass) | Orationes quattuor | da |
| 2531 | CIC1.6.6 | Marcus Tullius Cicero | Orationes vol. VI | da |
| 2532 | ISO1.1.1 | Isocrates | Orationes Vol.1 (ed. Blass) | da |
| 2533 | ISO1.1.2 | Isocrates | Orationes Vol.2 (ed. Blass) | da |
| 2534 | CIC1.6.2 | Marcus Tullius Cicero | Orationes, vol II | da |
| 2535 | CIC1.6.3 | Marcus Tullius Cicero | Orationes, vol III | da |
| 2536 | CIC1.6.1 | Marcus Tullius Cicero | Orationes, vol. I | da |
| 2537 | THE3.2.3 | Themistius | Orationes, vol. III | da |
| 2538 | CIC1.6.4 | Marcus Tullius Cicero | Orationes, vol. IV | da |
| 2539 | CIC1.13 | M. Tullius Cicero | Orationes. De lege agraria | da |
| 2540 | ASC1.1 | Quintus Asconius Pedianus | Orationum Ciceronis quinque ennaratio | da |
| 2541 | CIC1.10 | M. Tullius Cicero | Orator | da |
| 2542 | COM2.1 | Jan Amos Comenius | Orbis Sensualium Pictus | da |
| 2543 | SCH1.1 | Schachten, Winfried H. J. | Ordo salutis : das Gesetz als Weise der Heilsvermittlung ; zur Kritik des hl. Thomas von Aquin an Joachim von Fiore | da |
| 2544 | SOR2.1 | Sorel, Reynal | Orfeu şi orfismul | da |
| 2545 | MAI3.1 | Maier, Friedrich; Zeller, Alfred | Organon: Grammatik II. Sazlehre | da |
| 2546 | Orie46 | *** | ORIENS. Journal of Philosophy, Theology and Science in the Islamic Societies | da |
| 2547 | CRO4.1 | Crouzel, Henri | Origène et Plotin: comparaisons doctrinales | da |
| 2548 | VER2.1 | Vernant, Jean-Pierre | Originile gandirii grecesti | da |
| 2549 | MON3.1 | Monagle, Clare | Orthodoxy and controversy in twelfth-century religious discourse. Peter Lombard's Sentences and the development of theology | da |
| 2550 | BIB6.1.1 | Feldman, Louis H.; Kugel, L. James; Schiffman, Lawrence H. (eds.) | Outside the Bible: ancient Jewish writings related to scripture (vol. I) | da |
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