leaning tower of pisa

angle baptistry base began behind between black campanile cathedral centuries city cloud cloudy completed construction corrected decades degrees dramatic duomo early estimated facing feet floor foundation freestanding gradually ground height high increased italian known leaned leaning leans light low metres metric oldest one partially pendente perfectly performed piazza pisa prior properly restoration seventh short side simply situated soft square stabilized staircase steps structure support third tilt too top torre tower two unintended until vertical walls weight white width work