Adler Doane Observatory Renovation

The Adler Planetarium sought to convert the base structure of its 1977 Doane Observatory — originally accessible only through a small hatch and left uninhabited for nearly four decades — into a modern, multipurpose learning space. The structure’s massive 14-inch-thick concrete walls required significant alterations to introduce natural light and circulation. All construction activities had to protect the high-precision telescope directly above, where even minor vibrations could damage sensitive components. The observatory’s circular geometry created significant constraints for new mechanical, electrical, plumbing, and audiovisual (AV) systems. In addition, the planetarium wanted the renovated space to serve as a teaching tool with strong visual and physical connections to the lakefront and the sky.

GFT developed a renovation strategy that honored the observatory’s unique structure while supporting Adler’s educational and community-focused goals. The team removed more than 100,000 pounds of concrete to introduce four full-height windows and two new entrances. Inside, the team integrated new building systems within tight tolerances, including a vibration-isolated fan coil unit positioned directly beneath the telescope platform to safeguard telescope stability.

The design team reconfigured the interior to create an open, flexible environment for science, technology, engineering, and math (STEM) workshops, programming, and public events. The design team worked closely with Adler’s astronomers to develop a solar-aligned flooring pattern calibrated to the sun’s position during the summer and fall solstice events. The project team also reshaped the surrounding landscape to improve universal accessibility, open new lakefront views, and prepare for future stargazing and public programming.