The Italian government has announced a ban on giant cruise ships entering the centre of Venice. Accused of being dangerous, polluting and unsightly, the vessels will soon have to dock at a nearby port on the mainland. Italian ministers said the decision was made to "protect a historical and cultural heritage not only of Italy but of the whole world". Although the move has been welcomed by most Venice residents, hoteliers and shop owners are nevertheless worried about the impact it may have on the local economy, already hit hard by Covid-19. Our correspondents report.