This week's PhotoHunt was a tough one. All week long, I have been counting groups of things. I found 12 beautiful palm trees in a row, 7 great hibiscus flowers on a bush, but I have yet to find a group of 13 items that would make a good photo. I also searched through my photos with not much luck there either. I ended up going with a few photos with signs (even though next week's PhotoHunt has to do with signs). I figured with this choice, I could add a little bit of trivia to my post.
The word rione (plural - rioni) comes from the Latin word regio (plural - regiones) meaning regions. If Wikipedia is correct, the rioni in Rome were established for the first time in the 4th century BC by Servius Tullius, with only four, which at the time were called regiones (the plural of regio). More regions were added since then and they have been changed often over the years. Currently, there are 22 rioni.
R. XIII refers to the Trastevere rione of Rome.