In August 1173 in Italy, began to erect the Leaning Tower of Pisa from white marble, as part of the ensemble of the city's Cathedral of Santa Maria Assunta. To the surprise of the builders, five years later the incomplete design began to bend to the ground plane. So that it does not overturn at all, the building was frozen for almost a hundred years and only in 1275 the work was resumed, and the tower reached its present form by 1372.
By the time the engineers came up with a few tricks, that the appearance at least somehow corresponded to the architectural sketches. The slightly elongated columns on one side straightened the upper floors closer to the vertical axis, and the asymmetric decorative trim masked the slope. In addition, the builders lowered the design height of the tower, and it was 183 feet on the low side and 186 feet on the high.
