Just a few hundred people were expected at Italy's top tourism site.
Despite being illegal, undeclared work is common in Italy, with over three million people trapped in this form of precarious employment.
Another prominent art attraction, the Boboli Gardens of the Uffizi Gallery in Florence will start welcoming visitors on Thursday.
Europeans are being encouraged to cycle to work as countries gradually lift the COVID-19 restrictions. Paris, Rome and Barcelona have been revamping their bike paths to provide social distancing and allow more people to get about using pedal-power.
Italy celebrated Liberation Day on Saturday, marking the 75th anniversary of the end of the fascist dictatorship of war-time ruler Benito Mussolini.
Paris has seen a dramatic drop of 54% in nitrogen dioxide levels compared to the same period in 2019.
Only witnesses and a City Hall official were allowed into Saturday morning's ceremony in Italy's capital — and everyone wore masks
"The appropriate timing for the introduction of quarantine measures is what will determine how effective they are. If they are introduced too soon they might not be sustained, if they are introduced too late they might not be effective" - Dr. Michael Tildesley.
Popular tourist sites in Italy were shut down on Sunday as the Italian government took drastic measures to stop the coronavirus spread.
Several thousand people gathered in Rome on Sunday to join a rally organised by the anti-populist 'Sardines' movement.
All roads lead to Rome - and so does all traffic
After it was lunch with the grandchildren and then a nap.
Pope Francis is ringing in the new year in Rome.
Special effects artist Carlo Rambaldi was awarded Oscars for all three creatures, after learning how to make his first mechanised dummies at his father's bicycle repair shop.
Lamb stew with oxygarum; wild boar and venison stuffing; and cibarium bread. These were some of the Roman-era delights cooked up at a special banquet in Spain.
Football surporters were also heard chanting far right slogans.
Andrea Gandini is saving dead and decaying trees in Rome by making them into works of art.
The pope criticised countries that sell weapons but do not accept refugees from conflicts where arms are used.
Populist 5-Star supporters are voting today on whether to hook up with their long-time foe, the centre-left Democratic Party.
Francesco Daveri, a professor at the Bocconi School of Management, spoke to Euronews about the potential pitfalls, and points of consensus in any future Italian government.
Italy's firebrand interior minister could be pushed out of government
Michele Sodano and Lia Quartapelle
Engine fragments from a Norwegian Airlines Boeing 787 fell on roofs and cars in the area near Rome Fiumicino airport, causing damage but no casualties.
The father of a US teen arrested for the murder of an Italian policeman murder said his son didn't know his friend was armed.
Return plastic bottles for recycling at designated points around the city.
A policeman who had just returned from his honeymoon was stabbed to death in Rome while trying to make an arrest, reports AFP.