Even after 2600 years of being a city, nature continues its attempts to reclaim Rome. These roots are doing their part on this wall. The wall to Ace's right is brick, and we think the one to the left is an early version of cement.
Sorting out the ruins of the Forum must have been a monumental task. Even now, there are tons of broken marble columns that litter the ground.
Italy's version of a crow, the Hooded Crow, puts one of the broken stones at the base of the Arc of Septimus Severus to good use.