What collection of writings is associated with Hermes Trismegistus?

The collection of writings associated with Hermes Trismegistus is called the Hermetica.

The Hermetica are religious, philosophical, and esoteric texts attributed to Hermes Trismegistus, a legendary figure formed through the blending of the Greek god Hermes with the Egyptian god Thoth. Most surviving works were written in Greek or Latin during late antiquity, rather than by a single historical author.

Important texts include the Corpus Hermeticum and the Asclepius. Their subjects include cosmology, theology, the human soul, and the relationship between the divine and the material world. Renaissance scholars later renewed European interest in these writings.

The Hermetica should not be confused with Hermeticism as a broader intellectual and religious tradition. Hermeticism is the tradition inspired by the texts, while the Hermetica refers primarily to the body of writings themselves.