A dozen collections of world-renowned Lego artist Adam Reed Tucker is part of an exhibition at the Museum of Science and Industry in Chicago, which opened on Thursday.

“Brick by Brick” exhibit puts in the spotlight 13 products of the many years of hard work of Tucker in creating replica of famous figures using only his skills (and patience) in Lego.

According to Chicago Tribune, as reposted by Fredericksburg.com, Tucker began his career as a Lego artist by buying thousands of the interlocking plastic toys on his own and piecing them together. Now he even has his own Lego replica of the Six Flags Great American Eagle roller coaster.

The exhibit’s centerpiece is the 60-feet gallery-width replica of the Golden Gate Bridge in San Francisco.

“The biggest piece in that entire bridge is a 1-by-12 plate, and there are 14,000 of them in red,” Tucker told Chicago Tribune.  “I don’t use glue. I don’t modify the parts. I don’t want there to be any tricks. That would not be very inspiring.”

Wired said the exhibit hosts replicas of Burj Khalifa in Dubai, Ping An Finance Center in Shenzen, Eero Saarinen’s Gateway Arch, the International Space Station, the Palace of Fine Arts; Hoover Dam; Frank Lloyd Wright’s Fallingwater and  Cinderella Castle from Disney World.  The pieces took 2500 hours or more than one year of 40-hour work weeks to be completed.

Earlier, the same exhibition space  featured Tucker’s reimagined Lego versions of the Roman Colosseum and the Pyramids of Giza.

But special exhibitions director Anne Rashford thought that building a series of bridges using Lego calls for a “bigger story to tell.”

“I don’t know anyone that was more excited to be in the exhibit than the architects when they came to assemble those models,” Chicago Tribune quoted Rashford “They were more interested in learning what Adam has done and how he works.”

According to Wired, being a certified Lego professional like Tucker is no easy feat. Wired noted that there are just 14 Lego Certified Professionals in the world, even though there are 147 people on the Court of Master Sommeliers.