The Sisters of the Precious Blood (Latin: Congregationis Sororum a Pretiosissimo Sanguine, English: sometimes referred to as Congregation sisters of the Most Precious Blood) is a female religious teaching and social congregation of pontifical right[1] founded in Monza in 1874 and still headquartered there as of 2021.

It is dedicated to teaching, charity and social works present in Italy, Brazil, Kenya, Timor-Leste and Myanmar.

[3][4] In 1852, a community of young women under the leadership of Marie Mathilde Bucchi [fr] (1812–1882)[5] began to work with the Canossian Daughters of Charity in Monza with the aim of creating a Third Order.

The institute was recognized by diocesan right on May 17, 1876 by the Archbishop of Milan Luigi Nazari di Calabiana and received the approval of the Pope on July 10, 1934.

The foundress was recognized as venerable on April 28, 2006 and a sister of the Institute, Alfonsa Clerici, was beatified on October 23, 2011.