Rome Confluence of civilisations in art and water

Piazza Navona,  one of my favourite spots in Rome. The artwork of the confluence of civilisations in its riverways represented in art - the fountain's sculpture which depicts the convergence of the four rivers made an indelible impression when I visited, maybe too because Rome has been one of my faviourite sites in it's conversation with the past ....
The Trevi Fountain, itself, warms the heart as it conjures up the movie Three Coins in Fountain and the music of the movie too ... as indeed that movie has influenced the way we view fountains wherever they are ....see https://sites.google.com/site/krisrampersadglobal