I’ve done quite a bit of traveling to Europe over the last several months and notice that spiral staircases are used literally  everywhere.  I saw them in high end boutique shops, used to access a rooftop terrace, in a bookstore and even in Starbucks!  Isn’t it a great way to save space while adding an architectural feature of a building?  Whether they are made of marble, steel or just plain wood, the  twists, turns and curves, add a bit of character and beauty to any interior or exterior.