The USS Chatelet was a Federation starship operated by Starfleet during the 23rd century.
Christopher Pike and Una Chin-Riley had served aboard the Chatelet prior to 2250. (DIS: "Brother"; SNW: "Ad Astra per Aspera" display graphic)
This ship was presumably named after the Place du Châtelet, a public square in Paris, or for the Swiss mountain of the same name.