and letters to the original Theano (Theano I) and some to a later Theano (Theano II), but it is likely that they are all pseudonymous fictions of later writers, which attempt to apply Pythagorean philosophy to a woman's life. The surviving fragment of On Piety concerns a Pythagorean analogy between numbers and objects; the various surviving letters deal with domestic concerns: how a woman should bring up children, how she should treat servants, and how she should behave virtuously towards her husband. According to Thesleff, Stobaeus, and Heeren, Theano wrote in On Piety: Although some sources have claimed that Theano wrote about either the doctrine of the golden mean in philosophy, or the golden ratio in mathematics, there is no evidence from the time to justify this claim. As mentioned earlier, Theano wrote quite a bit of treatises, which is any sort of written work that deals formally and systematically in a certain subject. Theano wrote a few of these treatises which involved medicine, physics, mathematics, and psychology. During Theano's writing period she brought a few historical writings for us, which include Cosmology, The Theorem of the Golden Mean, The Theory of Numbers, and The Construction of the Universe. Out of all these writings it is said that, The Theorem of the Golden Mean, is the most conflicted writing due to the fact that Theano had made many arguable points. Because Theano wrote about the universe and planets in this writing, there might be some arguable points that other philosophers can make, for example Theano states that the stars are unable to move, but Aristotle would say the opposite, and say that they are able to move. The Theorem of the Golden Mean, is still used today and is one of Theano's most important writings. It is not uncommon for the works of women, especially those who worked alongside more famous men like Pythagoras, to not receive the credit they deserve from the work that they did. This might also contribute to part of her allure. She remains a mystery for many people, but they all agree that she worked alongside Pythagoras and that she published various different works under different pseudonyms. She is considered to be an extremely intelligent woman, based on her continuous education at the school her husband taught at. A lot of her credit got lost due to the fact that her husband was a more