The RIBA Journal, the magazine of the Royal Institute of British Architects, invites the public to celebrate the 175th anniversary of the RIBA and vote on the best of the best!

For this, the RIBA Journal has divided the RIBA epoch up into seven 25-year periods and selected a shortlist of seven key buildings from each:
Who will be your personal winner from each period?
Go and vote here. Closing date is May 8, 2009.