Abū ʿAbdallāh Muḥammad ibn Naṣr (1085–1154), known as al-Qaysarānī or Ibn al-Qaysarānī, was a Syrian Muslim poet who wrote in Arabic under the Zangid dynasty. He had a broad and scientific education, which included a sojourn in Iraq. He was one of the most renowned poets of his age, and the most prolific Zangid propagandist. He wrote extensively against the Crusades for his masters.