The Torre di Pisa is straightening up its act, according to scientists who monitor the famous tower’s tilt. There’s no need to worry, though, the Tower of Pisa won’t be standing completely vertical any time soon. The Huffington Post reported this week that the tower has shifted about an inch (2.5 cm) back toward being upright since 2001, when the structure was reopened to the public.
This gravity-defying maneuver was brought about by a restoration to the tower’s foundation that began in 1992 when the building’s foundation were secured, moving the entire structure a whopping 15 feet. Structural interventions included temporarily installing steel cables as an emergency measure followed by excavating stones beneath the tower and replacing them with steel and concrete. The overall effect, according to HuffPo, was to sink the tower slightly into the ground and thereby make it more vertical. Scientists said these restorative measures will make the Leaning Tower safe for two- to three-centuries.