superluxury
adjective
su·per·lux·u·ry ˌsü-pər-ˈlək-sh(ə-)rē 
-zh(ə-)rē
: characterized by extreme opulence and luxury, comfort, ease, and wealth : superluxurious
… on strictly financial grounds it's hard to see why the rest of the economy should emulate superluxury French-American restaurants.
Jerry Adler
Jerry Adler superluxury noun
a life of superluxury
… has long set the standard for superluxury in Italian hotels. Martin Wilmott Bennett et al.
Martin Wilmott Bennett et al. 
Word History
First Known Use
1917, in the meaning defined above