- Ijtihād (Islamic law)4
- Ikmāl (Ibn Mākūlā, ʻAlī ibn Hibat Allāh)1
- Ildephonsus, Saint, approximately 610-6671
- Ildobrandini, Geronimo1
- Illegible markings3
- Illegitimacy2
- Illinois--Chicago124
- Illumination of books and manuscripts127
- Illumination of books and manuscripts, Arab5
- Illumination of books and manuscripts, Batak6
- Illumination of books and manuscripts, Carolingian1
- Illumination of books and manuscripts, Dutch1
- Illumination of books and manuscripts, English1
- Illumination of books and manuscripts, Ethiopian3
- Illumination of books and manuscripts, Flemish3
- Illumination of books and manuscripts, French11
- Illumination of books and manuscripts, German2
- Illumination of books and manuscripts, Gothic32
- Illumination of books and manuscripts, Indic5
- Illumination of books and manuscripts, Iranian24