On August 9, workers lay the foundation stones for what will become the Leaning Tower of Pisa. Constructed of marble, lime, and stones, the tower is built in a circular ditch about five feet deep ...

Oh, the Leaning Tower of Pisa — so touristy and yet so fun. Each day, hordes of visitors come to the small northwestern Tuscan town of Pisa to take pictures "propping up" its tower. Some do it ...

The Leaning Tower of Pisa and its 5.5-degree lean has vexed engineers for centuries. Partially constructed on unexpectedly soft soil, the ancient bell tower began to lean before it was even ...

A young Galileo is perched atop the Leaning Tower of Pisa. He is in the middle of his famous experiment—the one in which he shows, by dropping cannonballs of different weights, that all objects ...

This architectural curiosity is a precise half-scale version of Italy's famous Pisa tower, rising 94 feet tall with a 28-foot diameter and leaning a significant 7.4 feet, according to the town's ...

Have you ever wondered if the Leaning Tower of Pisa is a catastrophe waiting to happen? In this one-minute video, Ask Smithsonian host Eric Schulze explains how architects and engineers spent the ...

When it comes to leaning towers, Italy’s Tower of Pisa immediately comes to mind for many. Beyond this famous tilting icon, the world is full of peculiar structures like it – from church ...