General view of San Marco Basilica in Venice, Italy, February 6, 2020. Floods in November and fears of the spread of coronavirus have caused a 10 percent decline in hotel bookings ahead of the Venice carnival, the Venice Hoteliers Association said. Picture taken February 5, 2020. REUTERS/Manuel Silvestri 

The moon is seen during a full lunar eclipse over the St. Mark basilica in Venice, Italy, July 27, 2018. Picture taken July 27, 2018. REUTERS/Manuel Silvestri 

Pedestrians cross the flooded Saint Mark's square on a raised walkway during a period of high water in Venice November 3, 2009. REUTERS/Max Rossi (ITALY TRAVEL ENVIRONMENT) 

Tourists walk in the Piazza San Marco in Venice September 4, 2008. The 65th Venice International Film Festival, organised by the Venice Biennale, will run from August 27 to September 6. REUTERS/Denis Balibouse (ITALY) 

Tourists line up near the Campanile on the Piazza San Marco in Venice September 4, 2008. The 65th Venice International Film Festival, organised by the Venice Biennale, will run from August 27 to September 6. REUTERS/Denis Balibouse (ITALY) 

A pigeon flies near the Campanile on the Piazza San Marco in Venice September 4, 2008. The 65th Venice International Film Festival, organised by the Venice Biennale, will run from August 27 to September 6. REUTERS/Denis Balibouse (ITALY) 

Tourists line up near the Campanile on the Piazza San Marco in Venice September 4, 2008. The 65th Venice International Film Festival, organised by the Venice Biennale, will run from August 27 to September 6. Picture rotated 180 degrees. REUTERS/Denis Balibouse (ITALY) 

The sun sets on the Campanile di San Marco in Venice August 30, 2008. The Venice Film Festival is taking place until September 6, 2008. REUTERS/Denis Balibouse (ITALY) 

A gay couple kisses outside Saint Mark's basilica during a demonstration of support for Italy's draft family law during the carnival in Venice February 14, 2007. A draft law championed by leftists in Italian Prime Minister Romano Prodi's coalition would allow unwed pairs, regardless of sexual orientation, to get certificates from town halls confirming they are a couple. REUTERS/Chris Helgren (ITALY) 

Gay couples kiss outside Saint Mark's basilica during a protest to show support for Italy's draft family law during the carnival in Venice February 14, 2007. A draft law championed by leftists in Italian Prime Minister Romano Prodi's coalition would allow unwed pairs, regardless of sexual orientation, to get certificates from town halls confirming they are a couple. REUTERS/Chris Helgren (ITALY) 

High water in Venice's lagoon floods St. Mark's square November 1,
2003. The number of high tides that covers low lying areas of Venice,
like St Mark's square, has increased in recent decades. Venice, which
rests on millions of wooden piles pounded into marshy ground has sunk
by seven centimetres a century for the past 1,000 years. REUTERS/Str
Michele Crosera

TG/WS 

A view of the Piazza San Marco in Venice showing the Palazzo Ducale (L) and
the Campanile San Giorgio (R), August 30, 2003. The city is currently
hosting the 60th Venice Film Festival where twenty feature films are
competing for the coveted Golden Lion top prize which will be awarded on
September 6. REUTERS/Tony Gentile PP03090022

SN 

A view of the San Marco Dome in the Piazza San Marco in Venice, August
30, 2003. The city is currently hosting the 60th Venice Film Festival
where twenty feature films are competing for the coveted Golden Lion
top prize which will be awarded on September 6. REUTERS/Tony Gentile
PP03090022

SN 

A man walks in the middle of St. Mark's Square flooded by high water in Venice November 14, 2001. HIGH RESOLUTION FILE REUTERS/Stefano Rellandini REUTERS BOOKS ON THE ROAD BOOK SR/SN