- Insertions (Production)1
- International relations1
- Jerome, Saint, -419 or 4201
- Jesuits1
- Jewelled bindings1
- Jews1
- John IV, King of Portugal, 1604-16561
- John Manuel, Prince of Portugal, 1537-15541
- John V, King of Portugal, 1689-17501
- Juana, of Austria, Princess of Portugal, 1535-15731
- Kansas--Lawrence1
- Lafões, Pedro Henrique de Bragança, Duque de, 1718-17611
- Latin (Latin Europe)1
- Letters, Papal1
- Liturgies1
- Luxembourg1
- Manuel I, King of Portugal, 1469-15211
- Manuscripts, French1
- Manuscripts, Hebrew1
- Manuscripts, Italian1