Christina the Astonishing was a 12th-century Belgian mystic and nun from Brustem. She gained fame through accounts of her miraculous life, most notably a legendary resurrection during her own funeral mass in Sint-Truiden. After appearing to rise from the dead, she reportedly chose to return to the earthly realm to perform intense penance and assist souls in Purgatory. Her life was defined by extreme asceticism, including enduring physical hardships and seeking out suffering to demonstrate her devotion and the reality of the afterlife.