Surrounded by elegant classical mansions and gilded wrought-iron grilles with ornamental gateways, which frame the marble fountains of Neptune and Amphitrite, Nancy's huge Place Stanislas is one of the most harmonious urban spaces in Europe.
There are lots of beautiful mansions surrounding. 
mnli hypothesis: There are lots of beautiful mansions surrounding.  premise: Surrounded by elegant classical mansions and gilded wrought-iron grilles with ornamental gateways, which frame the marble fountains of Neptune and Amphitrite, Nancy's huge Place Stanislas is one of the most harmonious urban spaces in Europe.