According to al-Ifrani, construction of the palace began in December 1578 (Shawwal 986 AH), only a few months after the Saadian victory at the Battle of the Three Kings and Ahmad's accession to power, and took fifteen years, finishing in 1593 (1002 AH). French historian Gaston Deverdun, however, points out that the "Portuguese plan" of 1585 (an illustrated document providing important information on the layout of Marrakesh's kasbah at the time) shows us a fully-completed palace, while at the same time there also exist records of Ahmad al-Mansur purchasing marble for construction up until 1602, a year before his death. This suggests that the major constructions of the palace may have been completed by the early 1580s but that al-Mansur continued to embellish the palace up until his death.