Perusing a long meaty juicy biography of Aretha Franklin (by David 'Ritz, 2014) I was startled by a passage which asserts "Let It Be" was "written for" Aretha by Lennon/McCartney, but she turned it down because of her "Baptist upbringing"--she thought the "Mother Mary" line sounded "a bit Catholic."
"Let It Be" is so personal to Paul I can't imagine him actually writing it for anyone but him. Or his giving it to someone else to record first.
I wonder if the author got this right. If so, rejecting it was another big mistake for Franklin (she kept making whoppers, she wouldn't listen to anyone and was very hard headed and stubborn) in her career. Of course, she got enough right (mostly her awesome singing pipes) to enjoy a long often very successful career. She wrote a lot of good songs, too, especially "Think." I'd been unaware she penned that herself.