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Viserys handing something off to one of Illyrio’s slaves (in quite an ornate slave’s collar) while speaking with his sister. Noted the ships painted on the wall behind them. The style of the vessels looks something along the lines of medieval cogs, rather than the galleys we would usually have expected. That said, the Free Cities do make use of cogs, carracks, and other such classes of ships, and indeed cogs are specifically connected to Pentos at one point in the series.