Palace of Versailles

In 1671, in Versailles, on the orders of Louis XIV, something like a bathroom was built - appertement des bains.

An excerpt from the article 29 facts about Palace of Versailles

There was a marble bathtub, or rather a swimming pool, which was used not so much for hygiene purposes, but rather as a place for the king's amorous trysts.

When the king bathed in the pool as part of the medical treatment recommended by the doctors, his well-being worsened. And every time doctors recommended swimming pool treatments to balance hormones, history repeated itself. Therefore, the king did not bother to take a bath, and the lack of baths did not bother him at all.