The Pureborn Princess is an old galley.
A Dance with Dragons
The Pureborn Princess is one of the thirteen galleys Xaro Xhoan Daxos sails with from Qarth to Meereen. He tries to persuade Daenerys Targaryen to leave Slaver's Bay and go to Westeros by offering the ships to her; Daenerys thinks the galleys were provided by the Thirteen. Groleo determines the ship is worm-eaten and he would not take it out of sight of land. Daenerys declines Xaro's offer.