3D print the Aon Center
A free, printable model of the skyscraper and the neighboring towers, streets and parkland around it, generated from real map data in your browser.
Free, in your browser. Exports a slicer-ready 3MF.
About the Aon Center
The Aon Center, at 200 East Randolph Street, is a modern supertall skyscraper in Chicago, Illinois, standing at the Chicago Loop's northeast corner. It has 83 floors and rises 346 m (1,136 ft). Perkins and Will and Edward Durell Stone, two architecture firms, partnered on the design. Its original name was the Standard Oil Building, and it was nicknamed Big Stan. It was completed in 1973. It became the Amoco Building in 1985 and took the Aon Center name on December 30, 1999.
Chicago's tallest completed building for a short time, it was overtaken by the Sears Tower. At completion it ranked fourth in the world by height, and only the Empire State Building and the original World Trade Center's twin towers, all in New York City, stood higher. It also held the title of the world's tallest building clad in marble. Its tubular steel-framed structure uses V-shaped perimeter columns, the same method as the original World Trade Center's twin towers.
The tower's first skin was 43,000 slabs of Carrara marble from Italy, thinner than anything previously attempted, which soon proved a mistake. During construction a 350-pound slab fell from the facade and crashed through the roof of the neighboring Prudential Center. Cracks and bowing turned up in an inspection in 1985, and between 1990 and 1992 the whole tower was resurfaced in Mount Airy white granite.
How it prints
Make this print opens the generator on a 600 m square around the landmark. Buildings print at close to true scale, so the landmark grows with the print size.
| Print size | Landmark height | Scale |
|---|---|---|
| 160 mm default | 94 mm | 1:3,750 |
| 200 mm | 117 mm | 1:3,000 |
| 256 mm | 150 mm | 1:2,344 |
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North
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East
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South
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West
- A very tall, slim tower
- The tower is tall and slender, so print slowly with good cooling to keep the upper floors clean. A larger print size keeps more of the crown at the top.
- Fine vertical ribs
- Thin vertical ribs run all the way up the facade. Print friendly adapts them to the print scale, and layers of 0.12 to 0.16 mm keep them crisp.
- One piece with the ground
- The Aon Center is joined to the ground in the exported file, and the four-side check found no floating parts, so nothing needs gluing.
- Pick the detail for your nozzle
- In the Buildings settings, set Landmark detail to Print friendly to adapt thin parts and small details to the print scale. Full detail keeps every modeled feature, for larger prints or a finer nozzle.
- Colors
- Buildings, roads, water and ground arrive as separate filament slots in the 3MF. The Aon Center takes the building color.
- File format
- You get a 3MF for Bambu Studio, OrcaSlicer or PrusaSlicer. Any of them can save it as STL if you need one.
About this model
The Aon Center is one of more than 2,300 landmark models in Mini Skyline. They are made with AI, and each one is checked from four sides in its real surroundings before release. Everything around it is built from OpenStreetMap and Overture map data. If you would rather print the shape from map data, turn off Landmark models in the Buildings settings.
Common questions
Is there an Aon Center STL I can download?
Mini Skyline builds the file for you in your browser and exports 3MF, which every major slicer opens. If you need an STL, open the 3MF in your slicer and export it from there.
How big can I print it?
Any print size from 40 mm across. The Aon Center grows with the print: about 94 mm tall on the default 160 mm print. For a model larger than your printer bed, Project Mode splits the area into tiles.
Is it free?
Yes. Generation runs in your browser, with no account and nothing behind a paywall.
