# Why doesn't the Leaning Tower of Pisa fall over?

- Institution: TED
- Department: TED-Ed
- Speaker: Alex Gendler
- Year: 2019
- Level: For everyone
- Language: English
- Subjects: Engineering, History, Art, architecture and design, Teaching and learning
- Source: [TED](https://www.ted.com/talks/alex_gendler_why_doesn_t_the_leaning_tower_of_pisa_fall_over)
- Licence: [CC BY-NC-ND 4.0](https://creativecommons.org/licenses/by-nc-nd/4.0/) (Non-commercial use only, and no changed versions.)
- Who can watch: Teens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

In 1990, the Italian government enlisted top engineers to stabilize Pisa's famous Leaning Tower. There'd been many attempts during its 800 year history, but computer models revealed the urgency of their situation. The tower would topple if it reached an angle of 5.44 degrees— and it was currently leaning at 5.5. What gives the tower its infamous tilt? Alex Gendler explores the monument's history. \[Directed by Aim Creative Studios, narrated by Addison Anderson, music by André Aires\].

## Lectures

1. [Why doesn't the Leaning Tower of Pisa fall over?](https://invisiblenetwork.ai/learn/ted/alex_gendler_why_doesn_t_the_leaning_tower_of_pisa_fall_over/e68b30742ab2), 5 min (TED's player)