Art merchants were the primary suppliers of two-dimensional drawn media, such as paintings and maps. With his apprentices, an art merchant could reproduce and sell decent copies of most works of art and drawings. They were still a raw trade, much like blacksmiths.
Each painting increased Monteriggioni's value, with the higher the price, the higher the added value. Paintings sold by art merchants changed depending on what region they were in. Once purchased, they could also be viewed at the art gallery on the second floor of the Villa Auditore, for some background information on the painting itself, and its artist. Art merchants weren't as common as blacksmiths or doctors, but there was at least one situated in each city.
Treasure maps marked the location of treasure chests located all over Italy. Like paintings, treasure maps differed depending on what location they were bought at. The art merchant of each region – being Florence, Tuscany, Romagna and Venice – possessed a map for each district that they covered. There was also another treasure map for Monteriggioni. Treasure maps for each district were unlocked after Ezio had visited the district at least once.