A moratorium is in effect on adding information from Fire and Blood until December 20th.
From A Wiki of Ice and Fire
Wealthiest and most powerful?
"Braavos . . . is the wealthiest and likely the most powerful of the Free Cities." Wouldn’t that be Volantis?
- Perhaps in the past, but in the present story it is not. According to The World of Ice and Fire, The Free Cities: Braavos: