Simon Stock, OCarm was an English Catholic priest and saint who lived in the 13th century and was an early prior of the Carmelite Order.

The Brothers of the Blessed Virgin Mary of Mount Carmel had their origins as a hermit community in Palestine; with the fall of the Crusader Kingdoms and the resumption of Muslim rule, in the early 13th century the members moved to Europe where they became mendicant friars.

[2] The earliest extant liturgical office in Simon Stock's honour was composed in Bordeaux in France, and dates from 1435.

"[5] Beginning in the 16th century, the Carmelites began giving the Brown Scapular to lay people who wanted to be more closely affiliated with them.

When Pope John Paul II addressed the Carmelite family in 2001 on the occasion of the 750th anniversary of the bestowal of the scapular, he said that this devotion was "a treasure for the whole Church," noting that the devotion was "so deeply and widely accepted by the People of God that it came to be expressed in the memorial of 16 July," the Feast of Our Lady of Mount Carmel.