Sealord of Braavos
From A Wiki of Ice and Fire
The Sealord of Braavos is the ruler of the Free City of Braavos. His champion and protector is First Sword of Braavos and he resides at the Sealord's Palace. Statues commemorating past Sealords and their achievements line the canals of Braavos. The office is not hereditary, when the Sealord dies a new one is chosen and knifes will come out. 
Many years ago Prince Oberyn Martell travelled to Braavos where Viserys Targaryen and Daenerys Targaryen were being kept by Ser Willem Darry. Oberyn and Ser Willem signed a secret pact, which the Sealord of Braavos witnessed, promising Viserys the hand of Arianne Martell in return for Dorne's help in claiming the Iron Throne. The name of the Sealord who witnessed the pact has not been mentioned.
At the time of A Feast for Crows the Sealord in power, Ferrego Antaryon, owned a pleasure barge and a menagerie of animals from all over the world. The pleasure barge is covered with laughing faces.