Abu'l-Qasim, Kalbid emir of Sicily

Abu'l-Qasim Ali ibn al-Hasan al-Kalbi, known to the Byzantine Greeks as Bolkasimos (Βολκάσιμος), was the third Emir of Sicily. He ruled from June 23, 970 to his death in battle on July 13, 982.

Emir, also transliterated as amir, is a word of Arabic origin that can refer to a male monarch, aristocrat, holder of high-ranking military or political office, or other person possessing actual or ceremonial authority. The title has a history of use in West Asia, East Africa, West Africa, Central Asia, and South Asia. In the modern era, when used as a formal monarchical title, it is roughly synonymous with "prince", applicable both to a son of a hereditary monarch, and to a reigning monarch of a sovereign principality, namely an emirate. The feminine form is emira, with the same meaning as "princess".

The island of Sicily was under Islamic rule from the late ninth to the late eleventh centuries. It became a prosperous and influential commercial power in the Mediterranean, with its capital of Palermo serving as a major cultural and political center of the Muslim world.

July 13 is the 194th day of the year in the Gregorian calendar; 171 days remain until the end of the year.