Cawley and Peoples Mortuary Museum
Marietta, Ohio
It's not "People's" as in "We the People;" it's "Peoples" as in Bill Peoples, who owns the collection. The museum is housed in the former hearse garage of a working mortuary, which has been in Marietta since 1898. Highlights include several elaborate old hearses, such as an 1895 Sayers & Scovill whose fiberglass horses whinny as you walk past, and a 1927 Henney prominently featured in the 2009 Bill Murray/Robert Duvall film Get Low (The film studio borrowed it from the museum).
There's a variety of other funeral memorabilia, caskets, and preservative regalia on display, mostly from the early 1900s, including a variety of corpse clothing and a giant hair dryer that was once used by embalmers on their customers. Most of it is portable, because morticians used to stage funerals in people's homes.