First off, div and p are both block level elements so you only need one, I recommend div in this case.
Please don't put any CSS inline, make a .css for your page. This may seem silly but it's standard practice and you'll thank yourself in the future for starting the practice now.
Your font face element id change with a span, assign it a class to add your style. Again just good practice.
On to your real question. Idk what the rest of your document looks like but I would remove the text-align and set margin:auto. This will essentially center your div in huge page instead of centering your text in the div.
