BetweenWritten and Visual Communication: CIDOC CRM Ontology for Medieval and Early Modern European Graffiti

The development of graffiti studies during the last couple of decades highlighted the relevance and potential of graffiti as a complementary source for understanding different aspects of past societies. Moreover, the availability of digital documentation techniques crucially increased data production, showing the widespread presence of graffiti in Medieval and Early Modern contexts across Europe. However, the approach to historical graffiti has not been yet structured. Guidelines, specific analytical tools, and descriptors are still missing due to various reasons. First, graffiti are a multiform and multimodal graphic expression, so texts, signs, and images must be considered together despite their different communicative nature. Secondly, due to their variety in forms and contents, graffiti have been studied from many perspectives (e.g., epigraphy, palaeography, history, art history, maritime studies), following the specific interests of each scholar. Consequently, the numerous and extensive contributions concerning graffiti highlight the lack of shared standards and approaches, hindering data analysis and interoperability. The panorama emerging is fragmentary and unstructured. This article thus aims to offer a first step toward the development of a specific methodology for the analysis and study of Medieval and Early Modern European graffiti. Precisely, a specific ontology adopting CIDOC CRM for Medieval and Early Modern graffiti will be presented, as developed in a preliminary form within the DIGIGRAF project1 with the support of the ARIADNEplus2 network.