It is flanked by the San Francesco Basilica at one end and the Basilica Santa Chiara at the other. Criterion (iv): The Basilica of San Francesco is an outstanding example of a type of architectural ensemble that has significantly influenced the development of art and architecture. In particular, the boundary comprises the San Francesco Basilica, within the extraordinary and stratified Assisi historic centre, and the other Franciscan places, which have marked the artistic history in Europe as well as in other continents. Assisi continues its medieval role as a spiritual centre for the Franciscan order and an important Christian pilgrimage. At a municipal level, the safeguarding of cultural heritage is reinforced both by an urban planning tool (the Structural Plan) and the World Heritage Management Plan.