Origin of mundanity
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Word Origin and History for mundanities
c.1500, from Middle French mondanité or directly from Medieval Latin mundanitatem (nominative mundanitas), from Late Latin mundanus "belonging to the world" (see mundane).
Online Etymology Dictionary, © 2010 Douglas Harper