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I had a Greek mythology phase in middle and high school which led to a lifelong love of Athena. Of course I wasn't going to pass up a chance to "dress up" as her for this project. Athena is the goddess of wisdom, handicraft, and war. I am not as into the war part, but an arts-and-crafts loving nerd, I related to her. She was a role model for me, especially as a girl.
As a kid, I loved D'Aulaire's book of Greek Myths, but I think my real Athena fandom came from the book We Goddesses: Athena, Aphrodite, Hera, which in retrospect was a formative read.
This image is from a kylix, which is a big wide Greek drinking vessel. They're really cool to look at if you see them in the Ancient Greece section of museums.
Reference image is from Wikipedia, by Marie-Lam Nguyen under the Creative Commons license.