Anning, reeking of alcohol, returned from the Jacobin monastery to the Versailles Palace. Vanni whispered to him, "Miss Christina is waiting for you on the terrace."
Anning: "Which terrace?"
There are quite a few terraces at the Versailles Palace.
Vanni: "Follow me."
So Anning took off his coat, handed it to an attendant nearby, and followed Vanni's steps.
The reason for wearing a coat was that, although it was already spring, it was still very cold in France at this time of the year—actually, in this era, France does not have many hot days every year.
That's why, even by the 21st century, only a few households in France have air conditioning. After all, summer lasts only a few weeks for them, and they endure it until it passes.
Unexpectedly, the Little Ice Age passed, leading into a warmer era, and subsequently, Europe began to experience widespread heat deaths.
However, this was not something Anning had to worry about at this time.
