Who wrote the treatise On Chastity?

There is no widely recognized treatise titled "On Chastity" by a single, well-known author. This is likely because the concept of chastity has been discussed and debated throughout history in various cultures and religious contexts.

However, there are numerous texts and authors who have addressed the topic of chastity, including:

* Religious Texts: Many religious texts, such as the Bible, the Quran, and the Hindu scriptures, contain passages about chastity and sexual morality.

* Philosophers: Philosophers such as Plato, Aristotle, and Thomas Aquinas have explored the concept of chastity from different perspectives.

* Medieval Authors: Many medieval authors, like Saint Augustine and Thomas Aquinas, wrote extensively on the topic of chastity, particularly in the context of Christian theology.

* Modern Authors: Contemporary writers and thinkers continue to explore the themes of chastity, sexuality, and morality, though the term "chastity" may not be used as frequently.

To give you a more specific answer, you would need to provide more context:

* What historical period are you interested in?

* What religious or cultural background is relevant?

* What specific aspects of chastity are you looking for?

With more details, I can help you find the specific text or author who addressed the concept of chastity in the way you are interested in.