Carmelites initially were order of hermits gathered on Mount Carmel in Holy Land, probably in the twelfth century. They migrated to Europe on account of Muslim danger in the thirteenth century and soon became a mendicant order. Insight on the beginnings of Carmelite order is important for uderstanding their later development. Their medieval heritage was the foundation on which order will be further formed, especially in the sixteenth century, under the influence of Teresa of Avila and John of the Cross. In the seventeenth century order established a wide network of misssionary work, which included Latin America and China. As a result of the French Revolution, the existance of the order was endagered, but the carmelite way of life was re-established in the nineteenth century.