Then after everyone's gone, stay on to see the marvelous 13th-century sculpted Angel's Pillar (Pilier des Anges) in peace.
The Angel's Pillar is located inside of building that is a very popular tourist attraction. 
mnli hypothesis: The Angel's Pillar is located inside of building that is a very popular tourist attraction.  premise: Then after everyone's gone, stay on to see the marvelous 13th-century sculpted Angel's Pillar (Pilier des Anges) in peace.