Sadr (rank)
Sadr ( Arabic صدر; Plural Sudur صدور) is an Arabic word for chest or front piece. The Ottoman Grand Vizier was known as Sadr-ı Azam ("broadest chest"). It was not until the end of the 14th century that it was used in Ottoman as a designation of rank for high judicial and religious officials, who were given the front seats, i.e. the places of honor, in meetings.
Most of these officers were grouped together in the majority as a class. Numerous proper names are derived from the title, see the explanation of terms Sadr .