Muhammad IV was assassinated in 1333 and replaced by his 15-year-old brother Yusuf I.[33] Fatima again became tutor and regent for her grandson, who was considered a minor and whose authority was limited to only "choosing the food to eat from his table".[34] According to Rubiera Mata, Fatima likely influenced Yusuf I's constructions in the Alhambra, the royal palace and fortress complex of Granada, but Boloix Gallardo argues that there is no evidence for this.[28][35] She died on 26 February 1349 (7 Dhu al-Hijjah 749 AH), during Yusuf I's reign, at the age of more than 90 years in the Islamic (lunar) calendar, and was buried in the royal cemetery (rawda) of the Alhambra.[7][28]