Northern Italy in $420s-$450s RT

Do you know how many leaning towers of Pisa there are? Here's a hint: it's not the number you're thinking of :-)

It's actually three. Everyone knows the famous one with the most dramatic tilt, but there are two other leaning towers in Pisa, thanks to the area's unstable soil (and a little shoddy craftsmanship).

Once you've seen the first tower, it's just a ten-minute walk to the church of San Nicola, complete with a lazily tilted bell tower. Fun fact: Both the Leaning Tower of Pisa and the bell tower of San Nicola were supposedly designed by the same architect, an incredibly unlucky dude named Diotisalvi.

Finally, the last leaning building is the bell tower of San Michele degli Scalzi, another church. Diotisalvi can't be blamed for this one, though, so maybe the medieval Pisans were just overall lousy at picking spots for towers.