A tomb or mausoleum is a building that has been set aside for the entombment of deceased individuals.
In the 17th century, Mila Xa had a mausoleum constructed for his bride Saeena. (TOS comic: "The Haunted Asteroid")
Following his death, Alexander was placed in the Tomb of Alexander in New Athens on Macedon III. (TOS - Star Trek II Short Stories short story: "Under Twin Moons")
Spock called the Museum of Missing Ships a "mausoleum". (TOS comic: "Museum at the End of Time")
The Paths of the Lost below Ashalla had several tombs for deceased Bajorans, including several individuals who had been Kai during their lifetime. (DS9 short story: "Ha'mara")
In an alternate timeline, Deanna Troi was placed in the Troi mausoleum after her death in 2368. Lwaxana Troi was placed there after her death in 2408. (TNG novel: Imzadi)