The leader of Szydlo's ruling Law and Justice party (PiS), Jaroslaw Kaczynski, said back in 2015 that refugees could bring diseases and parasites to Poland, which is staunchly Roman Catholic and has very few Muslim immigrants.
Interior Minister Marco Minniti ordered the measures after an urgent meeting of the Counter-Terrorism Strategic Analysis Committee (CASA) was called on Thursday evening, following the London attack.
EU President Donald Tusk and the prime ministers of Italy and Malta greeted the leaders as they arrived at the Renaissance-era Palazzo dei Conservatori next to the Forum, for a ceremony long on pomp and short on real politics.
Pope Francis touched on several contemporary political issues during his address, mentioning the crises "that engender fear and profound confusion among our contemporaries".
Saturday's commemoration of the 1957 signing of the Treaty of Rome will be attended by only 27 of the bloc's 28 leaders, with British Prime Minister Theresa May the notable absentee.
European Union leaders renewed their vows at a special summit in Rome yesterday, celebrating the bloc's 60th anniversary with a commitment to a common future without Britain.
The Pope has condemned the rise of nationalism and anti-immigrant populism in Europe and has urged European Union countries to show unity, as representatives from the 28-nation bloc gather to mark the 1957 Treaty of Rome.
"We need European unity as never before". Tajani will sign a common European Union declaration on the anniversary on behalf of Parliament. "Then we had country after country, because we saw that certain ones tried to take us hostage", he said, referring to the Polish government, which sought to sabotage the last summit two weeks ago by refusing to approve conclusions because the 27 other European Union nations appointed Donald Tusk, a local political rival, for another term as European Union president.
He insisted that only a united Europe can be a sovereign Europe, and only a sovereign Europe guaranteed freedom for its citizens. It's not enough to call for unity and protest a multi-speed Europe.
"When I travel to Africa and Asia, it feels as if the further away I go, the higher the approval of what is achieved in Europe..."
Mr Juncker reminded those present that following the agreement 60 years ago, peace had been given "a home on the European continent".
The air space over Rome would remain closed from 6 a.m. on Friday to 11 p.m. on Saturday, according to the Italian Civil Aviation Authority (ENAC). The ban reportedly includes flights by ultralight aircraft and drones. On Friday, Mr. Varoufakis used a press conference in Rome to warn that the "The idea of Europe is in retreat and the European Union is in an advanced state of disintegration".
"That spirit remains as necessary as ever today, in the face of centrifugal impulses and the temptation to reduce the founding ideals of the union to productive, economic and financial needs", he said.
She had been concerned that the document would fail to address issues of prime concern for Warsaw, like European Union unity, a common market equal to all, defense cooperation with North Atlantic Treaty Organisation and strengthening of national parliaments. He said the people in the room should be proud of having seen decades of peace on the EU's territory.