An image of photographer and preservationist Richard Nickel on display at a Driehaus Museum exhibition. (WTTW News)

A new exhibition, “Capturing Louis Sullivan: What Richard Nickel Saw,” explores the work of architect Louis Sullivan and a photographer on a life’s mission to capture his impact amid disappearing buildings.

A protest outside Garrick Theater c. 1960 (Richard Nickel / Art Institute of Chicago)

Rescued ruins and a virtual tour of a lost masterpiece of Chicago architecture — we speak with the city’s cultural historian and a noted artist who were part of a team exploring a long-lost theater and more.

The Francis Apartments were designed in 1895, early in Frank Lloyd Wright’s career. (Courtesy of the Library of Congress)

Today we know Frank Lloyd Wright as one of the most influential American architects, but early in his career he designed projects you might have trouble recognizing as his — even if you lived in the building.

The final building Louis Sullivan helped design is now for sale in Lincoln Square. (Steve Silverman / Flickr)

Never mind the square footage, floor plan or estimated property taxes. The primary selling point of this two-story mixed-use building rests almost entirely in its exquisite facade, which bears the unmistakable mark of the man who designed it.