I built this arch entry in a client's backyard recently. It's bigger than it looks and took more work than it looks, I assure you.

You're gonna have to visualize on this one... The porch was already there, there was a flat roof with a cedar deck on top of the screen porch, and the window above was a sliding door. Of course, when the roof leaks horribly, it's not so much fun to have such a thing on your house. So, we took off the deck, replaced the door with a window, replaced the rotten wood trim with composite trim, pitched the roof and put metal on it.