Dedicated to Saljūq ruler Sanjar ibn Malik-Shāh (r. 1118–57) and compiled after 1118, in the aftermath of the work done reforming the solar calendar (the “Jalālī calendar”); it contains 145 tables, some related to chronology and calendars, some for calculating holidays and fasting, material related to the theory of Indian cycles, the theory of planetary visibility, and an elaborate set of eclipse tables. The section on visibility tabulates the arcs of visibility for the 5 planets as well as those for the Moon, and it also presents differences according to climes. In the introduction to his Zīj, Khāzinī describes several astronomical instruments and observational techniques. It is preserved in 2 incomplete manuscript copies (British Library MS. Or 6669 and Vatican Library MS Ar 761), and in a revised abridgement called Wajīz al-zīj al-mu`tabar al- sulṭānī (made by Khāzinī in 1130/1131) which was translated into Greek in the late 1290s by Gregory Chioniades, upon his return to Constantinople from Tabrīz and used by Byzantine scholars such as George Chrysococces (in Trebizond, ca 1335–46) and Theodore Meliteniotes (in Constantinople, ca 1360–88).  [Abattouy]