Columba of Rieti, TOSD (2 February 1467 – 20 May 1501) was an Italian religious sister of the Third Order of St. Dominic who was noted as a mystic.

[1] As a small girl, Columba learned to spin and sew repairing the clothes of the local Dominican friars.

[3] Anorexia mirabilis was well known in Columba's time, when it was not seen as a medical emergency or mental illness, instead revered as a symbol of one's piety.

[4] Additionally, Columba was known to engage in acts designed to cause her physical pain, such as at the wearing of a hairshirt and sleeping on thorns.

[2] Legend says that at the moment of her death, her friend and fellow Dominican tertiary, Osanna of Mantua, saw Columba's soul as a "radiance rising to heaven".

[1][9] Columba was beatified on 25 February 1625 by Pope Urban VIII, and her feast day is celebrated within the Dominican Order on the anniversary of her death.