Sibṭ al-Māridīnī’s wrote extensively on mathematics and mathematical astronomy. According to al-Jabartī (d. 1822) his works on mīqāt and on astronomical instruments were still being studied in the curriculum of Cairo’s al-Azhar). It is thought that he grew up in Damascus, where his maternal grandfather, `Abd Allāh b. Khalīl b. Yūsuf Jamāl al-Dīn al-Māridīnī (d. 1406) was the muwaqqit of the Umayyad Mosque.  Later he traveled to Cairo, and was the student of Ibn al-Majdī (d. 1447). Sibṭ al-Māridīnī wrote extensively on mathematics and mathematical astronomy. The bio-bibliographical sources list some 25 treatises, many of which exist today in multiple copies. His works  related to astronomy and instruments are:  (1) Risāla fī al-`Amal bi-’l-rub` al-mujayyab (On using the sine quadrant); (2) Raqā’iq al-ḥaqā’iq (On calculating with degrees and minutes); (3) Zubd al-raqā’iq [this may be an extract from the previous treatise]; (4) Muqaddima (Introduction) to sine problems and spherical relations; (5) al-Ṭuruq al-saniyya (On sexagesimal calculations); (6) al-Nujūm al-ẓāhirāt (On the muqanṭarāt quadrant); (7) Qaṭf al-ẓāhirāt (Apparently an extract from the previous treatise]; (8) Hāwī al-mukhtaṣarāt (Another discussion of the muqanṭarāt quadrant); (9) Iẓḥār al-sirr al-mawḍūˁ (Use of a specialized quadrant); (10) Hidāyat al-ˁāmil (On another kind of specialized quadrant); (11) Hidāyat al-sā’il (On the quadrant mentioned in the previous entry); (12) al-Maṭlab (On the sine quadrant); (13) al-Tuḥfa al-manṣūriyya (On quadrants); (14) Muqaddima (Introduction) to construction of sundials; (15) a treatise on the equatorial circle; and (16) a treatise on the quadrant, astrolabe, and calendar. [BEA, DeYoung]