Mysteries of Prince: Artist Leaves Behind Thousands of Unheard Songs Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email Graffiti in Vitoria-Gasteiz (Spain). January 31, 2015 ( Zarateman / Wikimedia Commons ) Produced by Oliver Lazarus and Ellen Frankman Produced by PRI and WNYC