Okay, so imagine you have a big castle with lots of rooms and hallways. Now let's say you want to make a really special room that's super important, like a throne room for a king or queen.
Well, back in the old days, people used to put really fancy and pretty ceilings in these big important rooms. One type of fancy ceiling was called a "crown." It's called that because it sorta looks like a crown on top of someone's head, but instead of being made of gold and jewels, it's made of pretty patterns and decorations.
Now, one guy named Frank figured out how to make these special crown ceilings even better. He made them out of a special material that was stronger and could be made into bigger, more complex designs than ever before. So people started calling these fancy new ceilings "Frank Crowns" to show that they were the best of the best.
And now, when people want to make a really fancy and special room, they might choose to put a Frank Crown on the ceiling. Because even though Frank might not be around anymore, his cool invention is still remembered and appreciated many years later.