(covers information from several alternate timelines)
A fireplace was a structure, built to contain a fire.
A friend of Kira Nerys owned a two hundred-year-old cottage in the Musilla Province by 2373. This cottage was located in a forest, twenty kilometers from the next neighbor and thirty from the next settlement. It had two balconies, three fireplaces, and the Holana River was visible from every room. (DS9: "Looking for par'Mach in All the Wrong Places")
The holographic program "Leonardo da Vinci's workshop" included a fireplace. In 2374 it was set on fire when Seven of Nine visited the program and Captain Kathryn Janeway joined her. (VOY: "The Raven")