This has been growing for several years at a house in my neighborhood.
From a distance they look like small sunflowers.
But I noticed they came back this year after the house was sold and remains empty.
If they were sinflowers we have a plethora of critters here who would have eaten the seeds - and this is a large cluster of flowers.
You may be able to see that the stem is slightly prickly. Not enough to call it thorns, but enough to feel ALMOST sharp to the touch.

I wonder if it could be Swamp Sunflower (Helianthus angustifolius)

Looks a lot like it, but I think the center of mine is darker.
I hope to get a pic of the plant in situ on Tuesday - the whole plant photos in the db do look like it.

I have it here and the stems and leaves are rough/slightly prickly.

Rudbeckia hirta?
Black Eyed Susan (Rudbeckia hirta var. hirta)

or one of the rudbeckias.

The swamp sunflower has narrow strap like leaves which don't appear to be the leaves in the photo critter posted.

Ann, I bet you nailed it! LOL, I didn't even see the leaf in the picture (one of these days I will remember to enlarge photo's before making a guess) and I didn't even think to ask how tall the plants get ... the Swamp Sunflower grows 6 to 7 feet tall!

My first thought was some type of Rudbeckia. Like Ann said Helianthus angustifolius has long narrow leaves. Angustifolius means narrow leaf.

Well, it's at least 6 feet tall, it branches, and it looks like a "thicket".
Do any echies do that?

As I said, I should be able to get in situ shots on Tuesday.

With those leaves it's definitely not H. angustifolius but possibly some other sunflower that grows tall. I look forward to a photo of the entire plant and if you can get a shot of the leaves too, that should help.

Cutleaf Coneflower (Rudbeckia laciniata) grows tall but the bloom in your photo doesn't look to have the recurved petals as R. lacinata.

Get shots of the stem, leaves & bloom plus an "entire plant" shot.