Luxury and grandeur are saturated in everything at...

Luxury and grandeur are saturated in everything at the Mariinsky Theater. You must definitely go to feel the Russian spirit, enjoy the Russian culture, and see the works of classical music of world level. Artists, musicians are great.
Perhaps the seats are not very comfortable, in the stall I personally was not very visible because of the people sitting in front, so I recommend taking a mezzanine (well, or the royal box) and carefully looking at the hall layout.