- Buonaccorsi, Piero1
- Buondelmonte, Piero1
- Busdraghi, Matteo, 14th century1
- Busdraghi, Nicola, 14th century1
- Busdraghi, Piero, 14th century1
- Business ethics1
- Business mathematics1
- Byzantine Empire1
- Bāb al-Ḥādī ʻashar (Ibn al-Muṭahhar al-Ḥillī, al-Ḥasan ibn Yūsuf)1
- Caesar, Julius1
- California--San Marino1
- Calligraphy1
- Calligraphy, Arabic1
- Canonists1
- Carlos, Prince of Viana, 1421-14611
- Carrillo family1
- Carrillo, Pedro, -approximately 1436--Family1
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