hehe so I always make twilight shirts so I thought it would be awesome to make a harry potter one too! This is from the last and final installment....Harry Potter and the Deathly Hallows. Deathly Hallows are the magical objects made up by J.K Rowling.
The triangle represents the Cloak of Invisibility, the cricle represents the Resurrection Stone, and the line represents the Elder Wand. I loved it when I saw it on the wikipedia page and I thought it would be awesome on a shirt!