Lost Michelangelo bridge floats over Romebr br Michelangelo dreamed it, Olivier Grossetête did it: the artist from Marseille has created a cardboard bridge over the Tiber River in Rome to link the gardens of the Villa Farnesina to the Farnese Palace, a splendid Renaissance building that houses the French embassy. The 18-metre structure is suspended by three helium-filled balloons measuring six metres in diameter.