Why did kings and pilgrimage to holy shrines?

Kings often undertook pilgrimages to holy shrines to demonstrate their piety, seek divine favor, and legitimize their rule. Such journeys could reinforce their authority and strengthen their relationship with the church or religious institutions. Additionally, pilgrimage was a means of showcasing wealth and power, as it involved significant resources and often attracted followers and support along the way. This blend of spirituality and politics helped to unify their realms and promote social cohesion.