4 Small Rivers

In Dougga, the bizarrely-well preserved Roman city in northwest Tunisia, near the Algerian border:
Africus ... a huge circle marked out on the paving in an old square, denoting the various winds. Africus ... the hot wind. (The arc is the horizontal line running above the word africus)
(ip)siobhon(o ... a near-word created by the Latin run-on writing in an inscribed block in Dougga.
For both ... it's hard to see these as 1,800 years old, being so clearly written and well-preserved.