http://www.italianfrescoes.com/

I submitted my site about 1 year ago (the first time). Nothing happened for a loooong time then I re-submitted the site a few months ago to:
http://dmoz.org/Arts/Visual_Arts/Painting/Frescoes,_Murals,_Faux-Finishes/
...Still nothing...
I asked 1 month ago and I received the answer that the site was in a list with 70 others.
..still nothing...
How long does DMOZ take ??

It takes as long as it takes. If no one happens to be particularly interested in Italian frecoes this month, no one will work in that area. You'll just have to be patient.