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  1. Leaning Tower of Pisa
    Leaning Tower of PisaBuilding in Pisa, Italy
    OverviewAdmissionDiscountsToursInteriorActivitiesHours
     
  2. Copilot Answer
    LocationPisa, Italy
    Completed1372
    Architect(s)Diotisalvi (?) · Bonanno Pisano (?)
    Construction

    Construction of the tower occurred in three stages over 199 years. On 5 January 1172, Donna Berta di Bernardo, a widow and resident of the house of dell'Opera di Santa Maria, bequeathed sixty soldi to the Opera Campanili… See more

    History following construction

    Between 1589 and 1592, Galileo Galilei, who lived in Pisa at the time, is said to have dropped two cannonballs of different masses from the tower to demonstrate that their speed of descent was independent of their mass, in ke… See more

    Earthquake survival

    The tower has survived at least four strong earthquakes since 1280. A 2018 engineering investigation concluded that the tower withstood the tremors because of dynamic soil-structure interaction: the height and stiffnes… See more

    Technical information

    • Elevation of Piazza del Duomo: about 2 metres (6 feet, DMS)
    • Height from the ground floor: 55.863 m (183 ft 3+5⁄16 in), 8 stories
    • Height from the foundation floor: 58.36 m (191 ft 5+1⁄2 in) … See more