Maria Anna Donati was an Italian nun born in 1848 who founded the Calasanzian Sisters in Florence. After being delayed in her religious vocation by her father, she eventually entered the religious life in 1889 under the guidance of Celestino Zini. Upon her profession, she adopted the name Celestina of the Mother of God. Her congregation focused on providing education to underprivileged children, including those of prisoners and orphans, following the teachings of Joseph Calasanz.