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The Nuttall Encyclopedia
Specially a campanile of white marble at Pisa, in Italy, 178 ft. in height, and which leans 14 ft. off the perpendicular.
Wood, James, ed. Entry for 'Leaning Tower'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/l/leaning-tower.html. Frederick Warne & Co Ltd. London. 1900.