Workers at the Parisian landmark are making preparations to reopen on June 25, after three months of shutdown. It has been the site's longest period out of action since World War Two.
The tower's Surveillance Group – set up to monitor restoration progress – said in a statement that after 17 years of observation "the Tower of Pisa is stable and very slowly reducing its lean."
The leaning tower, a high-rise which lost its footing and ended up leaning on the buildings across the street for support, will be demolished.
A 20-year-old man used four suction cup-like devices and a climbing harness to scale the outside of the 58-storey skyscraper on Fifth Avenue in a bid to catch the attention of Donald Trump.
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