Henry B. Clarke House
Clarke House may have been modeled on the home of William B. Ogden. The Clarke house is often described as the oldest surviving house in Chicago, although part of the Noble-Seymour-Crippen House in the Norwood Park neighborhood was built in 1833. (However, Norwood Park was not annexed to Chicago until 1893.) The Clarke House was designated a Chicago Landmark on October 14, 1970. It was added to the National Register of Historic Places on May 6, 1971.
Gage Group Buildings
The tallest building is known as "18 South Michigan Avenue" and was previously called the Gage Brothers and Company Building. Before the Chicago street addresses were changed in 1909, the building had the address of 130 S. Michigan Avenue. The ornamental flourishes at the top of Sullivan's façade were pushed upwards when four stories were added in 1902 by different architects. This is one of only five buildings in Chicago designed by Louis Sullivan that are still standing.