A On average, 60,000 tourists a day fall on Venice – more than the population – but authorities fear the number could rise to 120,000 on Tuesday.
On Sunday there were scuffles when a few dozen activists tried
They carried a banner saying "Venice is not a nature reserve, we are not threatened with extinction."
The police intervened and the barrier was quickly reinstalled.  The mayor of Venice said the actions were an "experiment", suggesting that if they succeed, they could be reinstated in the future.
"The barriers are only closed when there are large crowds, and their goal is to dissipate and divert the flow of tourists," Luigi Brugnaro told the Corriere della Sera newspaper.
"We can close one part of the city and open another to control the crowd, and the Venetians have the right to a city that is safe and worth living."
Capri watches with interest and could take similar action To cope with the daily onslaught of day-trippers who threaten to stifle life from one place the literati from DH Lawrence to Graham Greene.