The link is to a PDF file, so you may need Acrobat Reader to use the link.
Here’s another link (also a PDF file) which contains a lot of various reference information about ancient structures and 3D modeling thereof. I don’t believe it’s the one you’re looking for, but it might be useful.
I can recall seeing a tutorial somewhere about modeling columns and scroll work a while back while looking for greek and roman textures for someone… I’ll search my history cache and see if there’s anything in there, and if I find something, I’ll be sure to post it.