It was built for the National Cash Register in the early 1900s and later became a showroom for Clark Peeper furniture. More recently, the building became a workspace and studio for interior designers Mark and Mary Pitliangas.

While this multi-level Missouri landmark has worn many hats over the years, it possesses a unique character. There is no other property like it.

"Its interior is a storybook, and the experience of being in [these] spaces cannot be overstated," says Justin Ströhm, listing agent for The Ströhm Group.

Upon entering the Gothic-style lounge, guests are greeted by unique murals and an assortment of homemade tiles and glassware.

A brass elevator provides access to a mezzanine meeting area and a third-floor loft apartment. But the real highlight of the property is the fifth-floor penthouse - complete with travertine floors, custom stonework and ceiling supports.

Although it is more than a century old, the current owners have completely updated the building. On the top floor, there are Viking appliances and a modern home theater.

In addition, the potential of this space is almost limitless. It could be used for almost anything.

"The zoning," says Strom, "is I-Central Business District, which allows for a plethora of uses, including residential, office, retail and restaurants." The ideal buyer is someone who has the talent and desire to create a unique experience - whether it's a short-term rental, a creative office, an artist space, or the most unique residence in the city.

These visions will likely be inspired by the downtown location, which is a short walk to famous attractions: the Arch, Bush Stadium, Stiefel Theatre, Union Station and a variety of bars and restaurants.

Because it is currently used as a design showroom, the property is filled with unique furnishings and antiques - all of which add to its vintage vibe and time capsule feel.

Buyers can be sure that some (or most!) of these pieces don't go out of style.

"The furniture is negotiable," says Strom." Some of it is sentimental for the owners, but much of it was made or purchased specifically for The Cosmopolitan and will stay."