{"id":895,"canonical_url":"https://www.kudos365.com/today-in-history/events/1173ce-aug-9--895","name":"1173 CE, August 9","year":1173,"era":"CE","month":8,"day":9,"url":"https://www.kudos365.com/today-in-history/events/1173ce-aug-9--895","iso-date":"1173-08-09","precision":"year-month-day","description":"\u003cp\u003eConstruction of the Campanile (Leaning Tower of Pisa) began on August 9, 1173, when the foundations of the tower were laid in the Field of Miracles. The white marble bell tower, likely, designed by Bonanno Pisano, began to lean in 1178, after construction reached the third floor. It was completed in 200 years later in 1372.\u003cbr\u003e\u003c/p\u003e","additional_details":"\u003cp\u003eThe lean was caused by a shallow 3-meter foundation built on weak, unstable clay and sand soil. In the 1990's, the tower dangerous tilt peaked at over 5.5 degrees but was secured to prevent collapse and stabilization efforts were completed in the early 2000s. Currently, the Leaning Tower of Pisa has a stable incline of approximately 3.97 to 3.99 degrees, returning to its 1838 position. The selected method chosen to slightly reduce its tilt to a safer angle, was to remove 38 cubic meters (1,342 cubic feet - Approximately 70 metric tons of soil from underneath the raised end).\u0026nbsp; The tower's tilt was reduced by 45 centimeters (17+1⁄2 inches) or about, 3,97 degrees.\u003cbr\u003eThe tower was declared stable and reopened to the public on December 15, 2001. The structure remains the Campanile for the nearby Pisa Cathedral.\u003c/p\u003e","photo":"https://k365fs.imgix.net/mJeBUHQDTFm96Du1ql7r_1280px-Duomo_di_Pisa_e_Torre_di_Pisa_20091113_104548-PD.jpg?auto=format,compress\u0026fit=clip\u0026max-w=1600","photo_width":1280,"photo_height":728,"created_at":"2025-03-17T18:52:09-07:00","updated_at":"2026-04-16T17:03:14-07:00","breadcrumbs":{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"August History","item":"https://www.kudos365.com/today-in-history/august"},{"@type":"ListItem","position":2,"name":"August 9","item":"https://www.kudos365.com/today-in-history/august-9"}]},"schema":{"@context":"https://schema.org","@type":"Thing","@id":"https://www.kudos365.com/today-in-history/events/1173ce-aug-9--895#eventK365","name":"1173 CE, August 9","headline":"Construction of the Campanile (Leaning Tower of Pisa) began on August 9, 1173, when the foundations of the... - 1173 CE","description":"Construction of the Campanile (Leaning Tower of Pisa) began on August 9, 1173, when the foundations of the tower were laid in the Field of Miracles. The...","url":"https://www.kudos365.com/today-in-history/events/1173ce-aug-9--895","additionalType":"HistoricalEvent","inLanguage":"en","datePublished":"2025-03-17T18:52:09-07:00","dateModified":"2026-04-16T17:03:14-07:00","publisher":{"@id":"https://www.kudos365.com/#organizationK365"},"image":{"@type":"ImageObject","url":"https://k365fs.imgix.net/mJeBUHQDTFm96Du1ql7r_1280px-Duomo_di_Pisa_e_Torre_di_Pisa_20091113_104548-PD.jpg?auto=format,compress\u0026fit=clip\u0026max-w=1600","width":1280,"height":728},"temporalCoverage":"1173-08-09","isPartOf":[{"@id":"https://www.kudos365.com/#websiteK365"},{"@type":"CollectionPage","@id":"https://www.kudos365.com/today-in-history/august","name":"What Happened in August History"},{"@type":"CollectionPage","@id":"https://www.kudos365.com/today-in-history/august-9#pageK365","name":"What Happened on August 9"}]}}