code error prevents me from seeing content in design view

First time question: I have made an error in coding and cannot see most of page in Design mode.

I can see everything in Live mode but cannot edit, only in code view.

I can see everything but content. And can't figure out what I've done wrong.

If anyone can point me in the right direction, I'd be much obliged.

I have attached code for page.
It's something between  aside and content, I think....

Thanks in advance,

Diane