Savina Petrilli was an Italian religious woman born in Siena in 1851. Deeply devoted to Saint Catherine of Siena, she established the Sisters of Saint Catherine to provide support for impoverished girls and those in need. This religious community, which received encouragement from Pope Pius IX, eventually expanded its work internationally, including opening its first mission in Brazil. She passed away in her home city of Siena on April 18, 1923, following a battle with cancer.