<p>Plaque about the <i>Potenze festeggianti</i> (1594) on the Santa Lucia church façade
in Florence, Italy.
</p>
The "feasting powers" were local districts popular groups of people, like Siena's "contrade", who met to organize celebrations and fighting. For instance in this case the "emperor" of Santa Lucia's power wanted to remember a battle won with a pebbles throwing fight.
<a href="//commons.wikimedia.org/wiki/User:Sailko" title="User:Sailko">Sailko</a>
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>