A Salon of Versailles' Palace Is Filled With Them

This page is the CodyCross answer for the clue below from Train Travel, Group 709, Puzzle 3 (Strangers on a Train).

Question is: A Salon of Versailles' Palace Is Filled With Them

and the answer is: MIRRORS

Word Meaning:

MIRRORS — plural of mirror

Definitions from Wiktionary.