Sirius: http://8bitdesigngroup.com/product/sirius-black-painting/#top-of-page
Dumbledore: http://www.independent.co.uk/arts-entertainment/books/features/jk-rowling-defends-dumbledore-seven-things-you-might-not-know-about-the-hogwarts-headmaster-10132237.html
Luna: https://www.pinterest.com/pin/278801033153034263/
Backgrounds: Zen BG
Quotes: https://letterpile.com/quotes/Top-34-Most-Inspirational-Harry-Potter-Quotes