A journey to a sacred place undertaken as an act of religious devotion. Its purpose may be simply to venerate a certain saint or ask some spiritual favor; beg for a physical cure or perform an act of penance; express thanks or fulfill a promise. From the earliest days pilgrimages were made to the Holy Land, and later on to Rome, where Peter and Paul and so many Christians were martyred. From the eighth century the practice began of imposing a pilgrimage in place of public penance. As a result, during the Middle Ages pilgrimages were organized on a grand scale and became the object of special Church legislation. In modern times, besides Rome and the Holy Land, famous shrines such as Lourdes, Fátima, and Guadalupe draw thousands of pilgrims each year from the Catholic world.