This lavishly decorated object is inscribed around the neck: "Made by 'Umar ibn al-Hajji Jaldak, the apprentice of Ahmad al-Dhaki al-Naqqash al-Mawsili in the year 623 [1226 A.D.]." Ahmad al-Mawsili, originally from Mosul in Upper Mesopotamia, was a famous metalworker who had a number of pupils.
