Working with Nicholas Gentile on our plans for Émilie & Voltaire (the title of the new opera, previously called The Propagation of Fire), to my delight I came across four lines by Voltaire about Cirey and Émilie that I've translated for you below.

Un voyageur qui ne mentit jamais
Passe à Cirey, l’admire, le contemple;
Il croit d’abord que ce n’est qu’un palais;
Mais il voit Émilie: ‘Ah, dit-il, c’est un temple.’

A traveller, precise about the best or worst,
Visits Cirey, contemplates it, calls it fine;
It seems just a palace, or so he thinks at first;
But he sees Émilie and says, ‘Ah, it’s a shrine.’