Pisa
The Duomo and the Campanile
The Duomo, or cathedral, of Pisa was built on the silty outer flood plain of the Arno. Unstable ground caused the bell tower to tilt radically even during construction, to the extent that the uppermost floors had to be built on a slant toward to center of mass in an attempt to even out the tilting. Still more special engineering has been required to prevent the structure from collapsing over the centuries since.
Pisa by night
Description
A quiet city
Pisa is the historic location of schools of medicine.
The Duomo
By the end of WW II, the campanile was leaning so far that the city feared it would collapse. Engineers stabilized it and were able to reduc the lean to a manageable amount.
Bottom: the Baptistery, used solely for the baptizing of children, on the other side of the Duomo. Because it was built on this same patch of unstable soil, it leans 0.6 degree toward the Duomo.
