Discover Civil may | Page 52

Do You Know ? The Leaning Tower of Pisa wasn’t always called that. Originally, it was just the Tower of Pisa, or the Torre di Pisa. This actually began during construction of the tower all the way back in 1173, but the tower began to lean further and further for decades as the tower was being built. Engineers tried to compensate for the tilt by making the columns and arches of the third story slightly taller on the sinking side; however, political unrest halted construction before they could continue to the fourth story. The Tower of Pisa was constructed over a period of 199 years! It’s funny to think about how old the foundation of the tower is compared to its upper floors – it’s a century older, at the least, than the rest of the building. Luckily, a restoration phase of 1990 to 2001 helped strengthen the foundation and touch up the building’s surface.