Recent research at the Maya site of Nakum, located in north-eastern Guatemala, and conducted by the Jagiellonian University of Kraków has led to the discovery of various incised sherds dating to different periods of Maya history and featuring diverse iconographic themes, from simple lines and geometric designs to more complex scenes of mythological character. Here we present a brief outline of the most important incised sherds found by the Nakum Archaeological Project and emphasising a large sherd that has been found in the core of talud-tablero platform and may depict a set of patron deities. Ceramic graffiti constitute an understudied topic in the scientific discourse of Maya studies and this is one of the first articles to be dedicated to this topic.