Begun after the Duomo in 1173, it began to lean when only three of its eight stories had been completed (the Duomo is also marginally off-kilter).
It collapsed from leaning too far.
mnli hypothesis: It collapsed from leaning too far. premise: Begun after the Duomo in 1173, it began to lean when only three of its eight stories had been completed (the Duomo is also marginally off-kilter).