One of my favorite civil engineering projects! 🌌Get Nebula using my link for 40% off an annual subscription: https://go.nebula.tv/Practical-Engineering 🚆Watch "The Logistics of X": https://nebula.tv/thelogisticsofx?ref=practical-engineering The lean isn’t just a fascinating oddity; it is integral to the historical character of the tower. It’s a big part of why we care. Unlike the millions of photos of tourists pretending to hold the Pisa tower up, the contractors, restoration experts, and engineers actually did it (for the next few centuries, at least). Sources: The script is primarily based on the papers linked below. https://www.tandfonline.com/doi/abs/10.1080/13556207.2002.10785324 https://associazionegeotecnica.it/articoli_rig/electro-osmosis-to-stabilise-the-leaning-tower-of-pisa/ https://www.issmge.org/publications/publication/the-leaning-tower-of-pisa-end-of-an-odyssey Watch this video ad-free on Nebula: https://nebula.tv/videos/practical-engineering-how-engineers-straightened-the-leaning-tower-of-pisa Signed copies of my book (plus other cool stuff) are available here: null Practical Engineering is a YouTube channel about infrastructure and the human-made world around us. It is hosted, written, and produced by Grady Hillhouse. We have new videos posted regularly, so please subscribe for updates. If you enjoyed the video, hit that ‘like’ button, give us a comment, or watch another of our videos! CONNECT WITH ME ____________________________________ Website: http://practical.engineering/ Twitter: https://twitter.com/HillhouseGrady Instagram: https://www.instagram.com/practicalengineering Reddit: https://www.reddit.com/r/PracticalEngineering Facebook: https://www.facebook.com/PracticalEngineerGrady​ Patreon: http://patreon.com/PracticalEngineering SPONSORSHIP INQUIRIES ____________________________________ Please email my agent at practicalengineering@standard.tv DISCLAIMER ____________________________________ This is not engineering advice. Everything here is for informational and entertainment purposes only. Contact an engineer licensed to practice in your area if you need professional advice or services. All non-licensed clips used for fair use commentary, criticism, and educational purposes. SPECIAL THANKS ____________________________________ This video is sponsored by Nebula. Stock video and imagery provided by Getty Images, Shutterstock, and Videoblocks. Music by Epidemic Sound: http://epidemicsound.com/creator Tonic and Energy by Elexive is licensed under a Creative Commons Attribution License Source: https://www.youtube.com/watch?v=U6fBPdu8w9U Video by Grady Hillhouse Edited by Wesley Crump Produced by Ralph Crewe Graphics by Nebula Studios