This is the most beutiful Villa in the hills behind Florence. It is incredibly good value and the setting is stunning - the gardens at the back are immaculate and we had 10 tables set up there overlooking the wonderful countryside view. The owner (Giorgio) is incredibly helpful and accomodating. NB: the Villa does not do catering.
Villa website: http://www.villadibivigliano.it/home%20italiana%20con%20frame.html - site currently only in italian, but if you e-mail Giorgio directly he can speak english.
For catering we used a firm called Del Colletto (website: http://www.delcolletto.it/new/index.html) who were brilliant: professional, helpful, friendly and the food is still a talking point. Florists were Tuscany Flowers (really lovely and a bit more expensive than normal), photographer was Edoardo Agresti - very good. Finally music was provided by a brilliant jazz trio and then a DJ
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