Blessed Bertha de Bardi (died 24 March 1163) was born in Florence. She was the daughter of Lothario di Ugo, Count of Vernio; while she is commonly known as de Bardi, some sources speculate that she is more likely to have belonged to the Alberti family.
Bertha joined the Vallumbrosan Order, a branch of the Benedictines, at Santa Felicita, Florence in 1143. The general of the order, Gualdo Galli, soon sent her to govern and reform a convent Cavriglia in Valdarno. Bertha remained there until her death, becoming famous for miracles.