originally delivered as a lecture in 1969, two years after the first English publication of Barthes’ famous essay "Death of the Author, 1967"; though he never explicitly mentions it, he is criticising Barthes' position here.
he also talks about what it means to be an author like Freud or Marx, i.e., someone who has not just authored specific works but also whole schools of thought
Foucault, M. (None). What is an Author?. None.