Abu al-Fadl Muhammad bin Tahir bin Ali bin Ahmad al-Shaibani al-Maqdisi, commonly known as
Ibn Tahir of Caesarea ("Ibn al-Qaisarani" in Arabic), was a Muslim historian and traditionist. He is largely credited with being the first to delineate and define the
six canonical works of
Sunni Islam after the
Qur'an, and the first person to include
Sunan ibn Majah as a canonical work.