The Discalced Carmelites, known officially as the Order of the Discalced Brothers of the Blessed Virgin Mary of Mount Carmel or the Order of Discalced Carmelites, is a Catholic mendicant order with roots in the eremitic tradition of the Desert Fathers. The order was established in the 16th century, pursuant to the reform of the Carmelite Order by two Spanish saints, Teresa of Ávila (foundress) and John of the Cross (co-founder). Discalced is derived from Latin, meaning "without shoes".

Mendicant orders are, primarily, certain Roman Catholic religious orders that have adopted for their male members a lifestyle of poverty, traveling, and living in urban areas for purposes of preaching, evangelization, and ministry, especially to the poor. At their foundation these orders rejected the previously established monastic model. This model prescribed living in one stable, isolated community where members worked at a trade and owned property in common, including land, buildings and other wealth. By contrast, the mendicants avoided owning property at all, did not work at a trade, and embraced a poor, often itinerant lifestyle. They depended for their survival on the goodwill of the people to whom they preached. The members of these orders are not called monks but friars.