Tomorrow (July 19th) at 1pm GMT, The Guardian will be hosting a live webchat with renowned English architect Richard Rogers. The soon to be 80-year old has already begun celebrating with a retrospective exhibition on his work at the Royal Academy. You can keep the Rogers-fest going by heading to The Guardian's site and posting your questions in the comments section. The next day, you'll be able to see responses from the architect himself. So, what would you ask Rogers?