When I was a small child, my Nannan would keep me amused by telling me a mixture of world + family history, fairytales, + Bible stories. I knew she was speaking from memory when she told me about the Second World War + my Mother's childhood, so I assumed that everything else must be from her memory, too... I thought she must have met Henry VIII + Jesus + Oliver Cromwell in person, or at least watched them on the news...
I can't remember when I found out she wasn't immortal, but it must have been a bit of a dissapointment.
A childhood belief about family

others believed things like this
- King Henry VIII was named “the eighth” by his dad because the first seven didn’t listen!— Mojo
- I used to believe that I was the only person in the entire world who knew about my favorite ratio station.— Gillian
- I used to believe that peanuts were a daily must to strengthen the memory like elephants — Qb Cheese
- I thought I was the only person in the world who didn't like ice cream— Bootlebat
- I thought the world was black and white because of all the smoke from the bombs in Second World War.— Bjoern
- I used to think Henry the 8th was Henry the ape because he was big and hairy— Brooke