Top hat
Shaxs wearing a top hat
A top hat, also known as a stovepipe hat, was a type of hat.
When the Enterprise encountered the Excalbian Abraham Lincoln, he was wearing a black top hat. (TOS: "The Savage Curtain"; ST: "Ephraim and Dot")
In 2365, Jean-Luc Picard wore a silk top hat as part of his Sherlock Holmes costume when dealing with James Moriarty. (TNG: "Elementary, Dear Data")
In 2381, an away team from the USS Cerritos found the remains of the same Lincoln, whose skeleton was on display in Hauze's ship. He was still wearing his top hat. (LD: "Kayshon, His Eyes Open")
On Qualor II, there was a hologram of a red top hat that was located on the street that Quark's Bar was located on. (LD: "We'll Always Have Tom Paris")
When Ensign Sam Rutherford was obsessed with learning how Lieutenant Shaxs came back to life, he imagined a number of possibilities. In one of those possibilities he envisioned Shaxs dressed as James Moriarty wearing a top hat. (LD: "We'll Always Have Tom Paris")