Il Nuovo Postiglione - King Charles set to arrive in Australia for landmark tour

Charles becomes the first reigning monarch to set foot Down Under since 2011, when thronging crowds flocked to catch a white-gloved wave from his mother Queen Elizabeth II.

The 75-year-old king will spend about 20 hours in the air before his flight lands in Sydney, where a montage of 16 previous Australian visits will beam across the Opera House sails.

After six days in Australia -- a schedule pared back to better manage the king's health -- Charles and Queen Camilla will jet across the Pacific Ocean on a rare trip to island nation Samoa.

Charles is expected to use the Australian leg to highlight the dangers of climate change, a message sure to resonate in a country scarred by bushfires and floods.

He will later meet scientists at a world-leading cancer research laboratory, another keenly watched stop given his diagnosis in February this year.

The visit will undoubtedly bring pomp, ceremony and plenty of media coverage.

There will be extravagant mass gatherings, including an event in front of the Opera House and a bustling community barbecue.

But aside from a clutch of staunch monarchists and ardent republicans, public sentiment on the eve of the sovereign's arrival largely sat somewhere between indifferent and unaware.

"I'd forgotten they were even coming," said 73-year-old Sydneysider Trevor Reeves, summing up the mood in Australia's largest city.

- The lucky country -

Australia is a land of many happy memories for Charles.

He first visited as a gawky 17-year-old in 1966, when he was shipped away to the secluded alpine Timbertop school in regional Victoria.

"While I was here I had the Pommy bits bashed off me," he would later remark, describing it as "by far the best part" of his education.

Bachelor Charles was famously ambushed by a bikini-clad model on a later jaunt to Western Australia, who pecked him on the cheek in an instantly iconic photo of the young prince.

Charles returned with wife Diana in 1983, drawing mobs of adoring fans eager to see the "people's princess" at landmarks like the Sydney Opera House.

And in 1994 a would-be gunman fired two blanks at Charles as he gave a speech on Sydney harbour -- a mock assassination staged as a human rights protest.

With six days in Australia and five more in Samoa, it will be Charles' longest overseas visit since starting cancer treatment.

He made a brief trip to France earlier this year for D-Day commemorations.

Charles' looming presence has so far done little to stoke republican sentiment in Australia.

He carefully tiptoed around the question on the eve of his arrival, reportedly saying it was ultimately a "matter for the Australian public to decide."

Polls show about a third of Australians would like to ditch the monarchy, a third would keep it, and a third are ambivalent.

E.Accardi--INP