The Leaning Tower of Pisa is leaning a little more, shifting and lengthening its shadow.

The city's university, which measures the tilt on the 12th century white marble tower every June 21, reported this week that it had inclined a further 1.29 millimeters, or 0.05 of an inch, in the past 12 months.It said the figure was not out of the ordinary, though the tower's custodian, Giuseppe Toniolo, has estimated it will topple in 100 years at the present rate of movement.

The 187-foot monument serves as the belfry to a cathedral and baptistry in the same grassed square in central Pisa.