Twenty Twelve w3c validation error

Hi, i am now up and running https://www.portoeseautomatismos.pt
and im going trough w3c validator errors, only got 4 to sort out but the first one it gives me seems so simple and yet i cant figure it out
the error it is giving me is

The align attribute on the div element is obsolete. Use CSS instead.
<div align="center">

i have tried several combinations and every time that single line disapears from the code the site looks awfull
any hint on how i can fix it?

thanks alot