This deathly 13th-century song shows up everywhere. Become a Video Lab member! http://bit.ly/video-lab Correction: Mozart’s Requiem isn’t a symphony, it’s a requiem: a type of Catholic mass for the dead. It was initially written for mass but later popularized and performed outside the church, as was Verdi's. Think back to some of the most dramatic scenes in film history — from The Lion King, The Shining, It’s a Wonderful Life. Besides being sad or scary, they have something else in common: the dies irae. “Dies irae” translates from Latin to “Day of Wrath” — it’s a 13th-century Gregorian chant describing the day Catholics believe God will judge the living and the dead and send them to heaven or hell. And it was sung during one specific mass: funerals. As Catholicism permeated world culture, the melody of the chant was repurposed into classical music, where it was used to convey a deathly, eerie tone. From there it worked its way into films — and if you don’t already know it, you’ve almost certainly heard it before: It’s played over and over in our scariest and most dramatic cinematic moments. Here’s Alex Ludwig’s original supercut of movies featuring the dies irae: https://www.youtube.com/watch?v=GLGa6vfDTIM There are so many references to the dies irae in classical music that we couldn’t include. One is Sergei Rachmaninoff’s 1908 “symphonic poem” Isle of the Dead (https://www.youtube.com/watch?v=dbbtmskCRUY. He was inspired by this painting from Swiss artist Arnold Böcklin that shows a coffin and white figure on their way to a small island (https://en.wikipedia.org/wiki/Isle_of_the_Dead_(painting)). Alex briefly touched on the differences between the ancient dorian mode and the modern minor mode. There’s a ton written online about them, but here’s a good place to start if you’re curious: https://www.musical-u.com/learn/get-familiar-with-the-dorian-mode/ Subscribe to our channel! http://goo.gl/0bsAjO Vox.com is a news website that helps you cut through the noise and understand what's really driving the events in the headlines. Check out http://www.vox.com/. Watch our full video catalog: http://goo.gl/IZONyE Follow Vox on Facebook: http://goo.gl/U2g06o Or Twitter: http://goo.gl/XFrZ5H