To answer this question would require eating a number of times at every pizza place in Rome, and life is too short.

Look for the crowd of locals and go there

l have tasten it at Rosso Pomodoro at Largo Argentina in Rome , consider l'm from Naples,and it was realy delicious.

We ate pizza a few times at lunch when we were in Rome in October, but didn't find the 'best' pizza .... regrettably :(

It's a good question ... here's a link that might provide some helpful info: http://www.fodors.com/news/story_3010.html

On my recent trip to Rome, I ate at a pizzeria called Ciro just around the corner from the Tritone fountain at Piazza Barberini. I tried it because it advertised authentic Neapolitan style pizza, cooked in a wood-burning oven, etc.

I've enjoyed several pizzas in Naples, and indeed the pizza in this place was as good as any of the pizzas I've had there. Highly recommended.

We ate pizza at Zio Ciro - I think it might be a chain, but it was good pizza. The one where we went was very close to Piazza Navona - it had a heated outside terrace - we were there in January this year.

Thanks to all for their help. I guess i will just follow my nose.

A couple of good leads there - just wish the GBP was a bit stronger.

I went to Da Francesco's which is on Piazza del Fico right near Piazza Navona, per the suggestions of people on this board. I loved it so much I went back. I made this little google map for someone else http://tinyurl.com/3p5zv and here is the pizza …flickr.com/1322/1371293563_720a9ee6ed_b.jpg

have fun :)

<<I loved it so much I went back.>>

It's burnt! We ate a few pizzas that looked like that, but as mentioned above, I didn't think we ate the "best pizza" in Rome.