geographical barycentre

Dear R users,
I need the coordinates of the geographical barycentre of each italian region
(Toscana, Lazio, ecc.): do you know some internet address to consult?
Best regards.

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Umberto Picchini (Dr. Statistics)
   Biomathematics Laboratory
CNR  IASI    Fisiopatologia Shock
         Universita`  Cattolica
Largo A. Gemelli, 8 -  00168 Rome (Italy)
Tel. +390630155389
umberto.picchini at biomatematica.it
           www.biomatematica.it