Strange Bird Nest

I found this bird nest hanging in the big pepper tree when I was hanging lights for the Dinner in The Grove which is happening tomorrow night.     I am not sure what kind of bird made this nest, but amazed at the work it must have taken to create it.   There is a hole in the top of it and it looks like some type of basket.   I am not sure if there is anything inside of it, but didn't want to disturb it if there was.