LEANING TOWER OF PISA - ITALY


The tower was built in 1173 but the architects stopped 5 years later because they first noticed a lean to the North. In 1250 they began to adjust the lean. In 1272, the tower began leaning toward the south. The lean increased by one-20th of an inch every year.

Links:
Leaning tower of Pisa
Pisa leaning tower