This paper explores the concept of authorial evidentiality in modern artistic discourse, focusing on how artists convey the sources of their knowledge, experiences, and influences within their work. Authorial evidentiality refers to the strategies and techniques through which creators indicate the origin of their ideas, whether derived from personal experience, external sources, or collaborative efforts. In modern artistic practices, this evidentiality is realized in diverse ways, from overt statements and references to subtler, implicit cues embedded in the artwork itself. The study examines various examples of visual art, literature, and performance to uncover how authors and artists negotiate the relationship between their work and its evidential sources.