Assunta Marchetti was an Italian Catholic nun born in 1871 in Camaiore. After facing family hardships following her father's death, she joined the religious life in 1895 under the guidance of Giovanni Battista Scalabrini. She traveled to Brazil that same year to assist orphans of Italian immigrants, a mission she pursued until her death in 1948 in São Paulo. Alongside her brother, the priest Giuseppe Marchetti, she co-founded the Missionary Sisters of Saint Charles Borromeo to support these missionary efforts.