Okay, go to https://www.d-anconia.com, notice the line the outlines each column, now click on any particualar post, and notice that one of the lines dissapears, cause it’s calling kubrickbgwide.jpg. Now, on the nave bar at the top left, click on “about,” and you’ll see that it, too, is using kubrickbgwide.jpg. I created the about page through the pages panel, as you say, which uses page.php to render the material, no?
