[citation needed] In 1580, at age fourteen, de' Pazzi was sent by her father to be educated at a monastery of nuns of the Order of Malta, but she was soon recalled to wed a young nobleman.

She chose the Carmelite monastery of Santa Maria degli Angeli in Florence because the rule there allowed her to receive Holy Communion daily.

Mary pointed to the crucifix and said: [5] Those who call to mind the sufferings of Christ, and who offer up their own to God through His passion, find their pains sweet and pleasant.Death seemed near, so her superiors let her make her profession of religious vows in a private ceremony, while lying on a cot in the chapel.

[7] As a safeguard against deception and to preserve the revelations, the de' Pazzi confessor asked her to dictate her experiences to her fellow nuns.

For instance, during one ecstatic event she predicted the future elevation to the papacy of Cardinal Alessandro de' Medici (as Pope Leo XI).

Two years after de' Pazzi died, the Jesuit Vincenzo Puccini, her confessor, published the life of this Carmelite nun as an edifying example.

In 1728, the date of 25 May was assigned instead to Pope Gregory VII, and her feast day was moved to 29 May, where it remained until 1969, when it was restored to its original place in the calendar, as the true anniversary of her death.

[16] According to researcher Ian Wilson, sometimes she would wear only a single garment but she would tear this off "in order to roll herself on thorns, or give herself another savage beating".

She also walked barefoot through the snow, dripped hot wax onto her body, and licked the wounds of the diseased, including those afflicted with leprosy.

"[18] The anthropologist Eric Dingwall wrote a chapter on Pazzi's alleged masochism and flagellant behaviors in Very Peculiar People (1962).

[19] Psychiatrist Armando Favazza in Bodies under Siege (3rd edition, 2011) wrote: At about age 37, emaciated and racked with coughing and pain, she took to her bed until she died four years later.