Nexas is a good example of a one column layout with a right-hand sidebar:

I could not find a good example of a one column layout without a sidebar, but as I will discuss later, sidebars are a good thing.

Because themes must adjust dynamically to accommodate various screen sizes for mobile devices, I recommend either a one- or two-column layout for your website, with the addition of a sidebar, which is covered at the end of this training.