"Architect James Goettsch of Goettsch Partners designed the building. The 33-story first phase was completed in 1997 under the firm name of Lohan Associates (now Goettsch Partners). The 24-story second phase started in 2007 and was completed in 2010" (Wikipedia).

Notable Tenants:

- Baker & McKenzie

- Health Care Service Corporation

- Roundarch Isobar

Statistics:

Formerly: 411 feet.

New height: 796 feet.

Formerly: 33 stories.

Now: 57 stories.

Former floor space: 1,400,000 square feet.

New floor space: 2,300,000 square feet.

The Blue Cross-Blue Shield Tower is a "unique combination of a build-to-suit headquarters and a multi-tenant office tower in downtown Chicago" (ctbuh).

"The best views of this building are actually from the back. And at night. This is how you can appreciate the structure of the building. It features a massive central atrium that is clearly visible through the glass in the darkness. You can sit in Lake Shore Park and watch the internal elevators whiz up and down the edges of the atrium serving the workers toiling long into the night. That atrium is surrounded on three sides by banks of offices. The arrangement is similar to the classic light well common in many Chicago buildings built around the turn of the 20th century. People in the offices are able to get light from all sides, even if they are deep within the center of the structure" (Chicago Architecture).