eXtreme Design (XD) for Ontological Engineering in the Digital Humanities (DH) with Viewsari, a Knowledge Graph (KG) of Giorgio Vasari's The Lives

Knowledge graphs (KGs) and ontologies have become valuable tools in the digital humanities (DH) for integrating interdisciplinary, diverse datasets and applying linked data and FAIR principles. In the form of a use case, this paper emphasizes the practical value of employing established best practices in ontological engineering, such as eXtreme Design (XD) and Ontology Design Patterns (ODPs), in the DH. As part of a broader project, it realizes the design and evaluation of a KG built upon Giorgio Vasari's seminal Renaissance text, Lives of the Most Excellent Painters, Sculptors, and Architects, a collection of artist biographies -- the Viewsari KG. This way, applying an ontology engineering methodology in a real-world DH project functions as a metaphor for guiding future projects in the domain, emphasizing the importance of thoughtful ontology design for representing DH content.