It towers over the valley below , giving the impression of a fortress .
Next to the basilica stands the friary Sacro Convento with its imposing walls with 53 Romanesque arches and powerful buttresses supporting the whole complex .
Sacro Convento towers over the valley below , giving the impression of a fortress .
Next to the basilica stands the friary Sacro Convento with its imposing walls with 53 Romanesque arches and powerful buttresses supporting the whole complex .