On 15 May 1642, at Kashan, Mohammad Mirza was crowned as shah of Iran and chose "Abbas II" as his dynastic name. Since he was less than ten years old when he became shah, the job of governing Persia was placed in the hands of his mother, Anna Khanum, and the grand vizier, Saru Taqi, while Abbas concentrated on his education at Qazvin. Anna Khanum and Saru Taqi worked closely together, and under them Iran was in secure hands. The French traveller Jean Chardin noted their close working relationship, saying: