Interesting picture, courtesy of Angelo Da Fano. Thank you Giuseppe Roditis Mirabella for his insight: When the Prince of Piemonte of Savoia house got married in Rome, the year that followed, from all over the Impero came in Rome populations to greet the royal couple. They also came from Rhodes and other isles. Here we see the men in a "saluto fascista" or "romano" and the women are from the isle of Stampalia, and place most really it's the Colosseo