如何在HTML / CSS中将图像放在图像上？没有什么工作

I am trying to take one image, place it on the screen as a background, and then put a company logo on top of it so it all looks like one image. I have looked at other people's examples, and those give me the background where I want it, but the company logo that I want on top of the background is displayed beside the background instead of on top. Nothing I try seems to be working. Can someone please help? HTML:I am trying to take one image, place it on the