As Chase renovates its downtown HQ, can the plaza’s modernist McDonald’s stay on the menu?

Part of the Chicago Loop’s magic was the occasional oddball, unexpected, “How in the heck did this get here? ” place that used to dot downtown.

Places like Harem Hosiery, with its faux 1001 Arabian Knights neon sign, that used to be at 110 S. State St.

Or the menagerie of old-school businesses, such as the wig-makers, correspondence schools and the like that used to populate old Block 37 and the pre-gentrified Reliance Building at State and Randolph streets.

A later addition to those curiosity shops — and one that I fear could also vanish — is the McDonald’s restaurant at 23 S. Clark St., on the southwest corner of the Chase Tower Plaza.

Designed and built in 1972 (the plaza was finished three years after the iconic slope-faced banking tower was completed), the restaurant building is a clever, and maybe a bit under-appreciated, steel-and-glass pavilion at Clark and Monroe streets.

A shorty in the land of downtown’s giants. And that burgers and fries are served and eaten in a place with a modernist wood panel interior and some pretty classy-looking hanging lights, is part of its charm.

But how long will the little building or the restaurant remain? JP Morgan Chase, which recently announced plans to give its 10 S. Clark St., headquarters and plaza a major and much-needed head-to-toe renovation, hasn’t said.

Neither did McDonald’s, nor the Chicago office of Gensler, the architecture firm hired to handle the project, when asked to comment.

If the McDonald’s building is in danger, would it constitute a possible five-alarm downtown building preservation emergency? Well, no. That honor still goes to the horrible way the Century and Consumers buildings on State Street continue to be treated.

But with big changes afoot at Chase Tower, the McDonald’s is worth keeping an eye on.

“It’s a rare piece of humanly-scaled modernism in the Loop,” said Bonnie McDonald, president and CEO of the group Preservation Chicago. “Additionally, as a McDonald’s, the building has been publicly accessible, akin to the Miesian post office two blocks south. Reuse can and should be considered.”

An ‘elegant little building’

Originally built as headquarters and banking halls for First National Bank of Chicago, the 60-story Chase Tower was jointly designed by architecture firms Perkins & Will and the old C.F. Murphy Associates, which is now Jahn.

The building containing the McDonalds (and a Noodles & Co. franchise) was originally extra teller’s space. It was also designed by the two firms, with an assist from First National Bank’s own in-house architects, said Perkins & Will design principal Jerry Johnson.

“[We] had as one of our consultants to the project, the guy who takes pictures of people in plazas, William Whyte,” Perkins & Will designer partner C. William Brubaker told interviewer Betty J. Blum in 1999 as part of the Art Institute of Chicago’s Chicago Architects Oral Histories Project.

“All of his research pointed out — he used Rockefeller Center as the most successful example — that … [a] street level plaza is better and a submerged plaza is the best,” said Brubaker, who died in 2002. “It serves as an amphitheater and that just works like a charm.”

And the McDonald’s building, with its big floor-to-ceiling glass windows, provides a view to it all.

“I remember when that was an elegant little building,” said Preservation Chicago Executive Director Ward Miller. “And I think it still is.”

Chase Tower and plaza redo is needed

Chase deserves a hearty tip of the hat for its decision to renovate the tower and plaza. The company hasn’t disclosed the cost, but it looks to be well into the nine-figure category, judging from the renderings.

This is the kind of investment downtown and its postwar modern skyscrapers need. Especially now. Just over 7,000 people are employed there.

Chase says the plaza’s redo will include the plaza, with new seating, landscaping and better accessibility to the Chagall.

Here’s hoping more details and renderings will be released soon. And that whatever changes happen, a renovated Mickey D’s building is also on the menu.

Lee Bey is the Sun-Times architecture critic. He is also a member of the Editorial Board.

Send letters to letters@suntimes.com