sumptuousness
Concise Oxford English Dictionary © 2008 Oxford University Press:
sumptuous/ˈsʌmptʃuəs/
▶adjective splendid and expensive-looking.
– derivatives
sumptuosity noun,
sumptuously adverb,
sumptuousness noun.
sumptuosity noun,
sumptuously adverb,
sumptuousness noun.
'sumptuousness' also found in these Oxford entries:

