 However, only the outer shell of the main church, along with the ground floor arches of the cloister remain from the earliest construction, due to subsequent remodeling projects.Over its history, this complex, especially the main church, was remodeled several times because of its importance to the evangelization efforts as well as its later importance as a parish church then Cathedral.Of the fourteen early monastery complexes recognized by the World Heritage organization, this is the only one which has experience large scale changes since it was built.