Giulia Ammannati (1538 - August 1620) was the mother of Galileo Galilei. She bore her husband, Vincenzo Galilei seven children, Galileo included. After Vincenzo died in 1591 it fell to Galileo to support his mother and siblings. The fact that he was attending university made the burden that much heavier. Some evidence indicates that Giulia Ammannati was a difficult person to deal with, and surviving letters indicate that she reported her son to the Roman Inquisition on more than one occasion for failing to perform his religious duties. She died of natural causes in 1620.