Gloria (1981)
No, it's not a cover of fellow Irishman Van Morrison's 1960s hit. This one comes from U2's sophomore album, October, which was heavy-laden with references to religion and spirituality. Bono has said he had a difficult time writing the lyrics, so he turned it into a psalm, complete with verses in Latin. The music is quite edgy considering the subject matter, which is what makes it classic U2.