451. University of Pennsylvania, Ms. Codex 825 Title: Summa logicae Author: William of Ockham Place: Bologna Date: [between 1350 and1399]
452. University of Pennsylvania, Oversize Ms. Codex 826 Title: De astronomia Author: Ǧābir Ibn-Aflāḥ Place: France Date: [1300?]
453. University of Pennsylvania, Oversize Ms. Codex 827 Title: De improbatione concentricorum et epicyclorum Author: Henry of Langenstein Place: England Date: [between 1362 and 1399]
454. University of Pennsylvania, Ms. Codex 839 Title: Historia gestorum Alexandri pueri magni Place: Germany Date: [1400-1450]
455. University of Pennsylvania, Oversize Ms. Codex 83 Title: Liber bellorum domini Author: Peter Paludanus Place: Spain Date: [between 1400 and 1425]
456. University of Pennsylvania, Oversize Ms. Codex 841 Title: Historia destructionis Troiae Author: Guido delle Colonne Place: Northern Italy Date: [1370?]
457. University of Pennsylvania, Ms. Codex 857 Title: Summa Author: Giovanni da Bologna Place: Italy Date: [1270-1299]
458. University of Pennsylvania, Ms. Codex 862 Title: Blancandin Place: France Date: [between 1275 and 1325]
459. University of Pennsylvania, Oversize Ms. Codex 906 Title: Roman de la rose Author: Guillaume de Lorris Place: France Date: [after 1474]
460. University of Pennsylvania, Oversize Ms. Codex 910 Title: Decameron Author: Giovanni Boccaccio Place: France Date: [after 1414]