Great structure!! As usual you've managed to replicate another famous skyscraper with pinpoint accuracy. Having been to Chicago many times, I know exactly what this building looks like and you did great!

The interior is complex....very impressive! I love how it all comes together. Very clean, and a wonderful addition to the micro world.

Wonderful technique.

An ingenious internal structure!

Sean, I originally thought about using this technique for my WTC model, but the cost and piece availability at that time wasn't in my favor. It wouldn't work so well for me now because I would need to greatly increase the scale of my WTC to simulate a reasonable number of columns. When viewed from a distance, the Aon Center has a stronger vertical column presence than the WTC because the columns, while fewer in number, are each much larger in size. The stark contrast of using white tile grilles against the black windows would have disrupted this strong vertical continuity.

I saw this when I was in Chicago last weekend, And you've captured the style and structure of the building perfectly, very good job. ~T

Excellent, clean MOC. -And especially thank you for the look inside of the structure, which answers some questions.

Awesome work! What's next?

Amazing work, as always! I'm surprised you didn't use the same technique as your WTC, though, since they have such similar façades. Any thought to doing the WTC with this technique? ;)

Stunning. I like the construction methods employed for this one. Your skyscrapers are simply phenomenal.

I always thought this would be a fun but easy Lego build. Obviously it was not easy! You did a great job. And as I have visited my friend who works in the plaza many times, I can tell you it's very accurate. Well done!

Awesome! very detailed and nice description. I'm gonna guess you had to use quite a chunk of change to order all of those white pieces with the sliders.

The AON Center. Perhaps my favorite skyscraper in Chicago. You captured it. Quite wonderfully. Randolph street and the small plaza at the ground floor are perfect remakes of the real thing. Overall, you did a fantastic job on this model. The structural concepts are quite astounding. You are probably the best skyscraper builder here, and the inspiration for my WIP Skyscraper. Congrats on a job well done, Spencer. ~Tom

Quite a remarkable construction you have there. Love the innovative idea with the lines on the building, and the scene on the bottom =)