basilica dei santi silvestro e martino ai monti, vle del monte oppio, rome, italy

basilica dei santi silvestro martino monti rome italy early christian basilica roman catholic church pope sylvester saint martin tours monti district ancient architecture interior baroque style frescoes relics holy martyrs medieval pilgrimage history façade church religious art liturgy sacred space landmark tradition romanesque altar historical ecclesiastical churches papal nave apse decoration columns saints crypt monastic italian liturgical site chapels gothic influences mosaics heritage martyrs’ shrine restoration order pilgrimage floor plan