St. Christina, a Tuscan virgin, who when ten years old had taken and destroyed the silver idols in her father’s house, was in consequence tied to a post and pierced with arrows. Her tomb was discovered in 1880; an examination of her relics showed that she was scarcely more than fourteen years of age at the time of her death.

(Source: The New Roman Missal, Rev. F. X. Lasance)

This vigil was celebrated from the earliest times. It is recorded in the Martyrology of St. Jerome.