BUDAPEST (Reuters) - Hungarians rose up in one of the largest protests against the seven-year rule of right-wing Prime Minister Viktor Orban on Sunday, protesting against new legislation that could force out of the country one of its top international universities.

People light with their mobile phones as they protest against the bill that would undermine Central European University, a liberal graduate school of social sciences founded by U.S. financier George Soros in Budapest, Hungary, April 9, 2017. REUTERS/Laszlo Balogh

The Central European University (CEU), a school founded by U.S. financier George Soros, could be forced to leave Hungary after a bill passed in Parliament this week by Orban’s Fidesz party set stringent, new conditions under which it must operate.

The bill has led to criticism from hundreds of leading academics worldwide as well as from the U.S. government and the European Union.

The protest drew some of the largest crowds against Orban’s seven-year rule, with organizers estimating attendance around 70,000. The crowd marched across a bridge over the river Danube and filled the square outside Parliament, which was defended by several lines of police, some in riot gear.

Thousands of people, mostly students, stayed on after the main protest for an unannounced march on the building of the Education Secretariat, then on to the headquarters of Fidesz, where where they chanted anti-Fidesz slogans before, with numbers dwindling, they blocked Oktogon square, a busy intersection in central Budapest.

Though passionate, the protest remained peaceful throughout.

Hungarian President Janos Ader must now sign the bill by Monday to make it law. The protesters said they wanted to convince Ader to reject the bill and refer it to a constitutional review.

“What do we want Ader to do? VETO,” the crowd chanted. “Free country, free university!”

“The government wants to silence pretty much everyone who doesn’t think the same as them, who thinks freely, who can be liberal, can be leftist,” protest organizer Kornel Klopfstein, a PhD student at the University of Bielefeld in Germany, told Reuters.

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“According to the government one of the centers of these people is at CEU... We should stand up for academic freedom and for CEU.”

The students sat down on the pavement and chanted slogans like “Here is the end, Viktor”, or “Fidesz is dirty”.

CRACKDOWN ON DISSENT

The government has been tightening up on dissent in other ways as well, proposing tighter rules on non-governmental organizations (NGOs), which will have to register with authorities if they have a yearly foreign income of 7.2 million forints ($25,000).

The rules are admittedly targeting organizations funded by Soros, a Hungarian-born American financier who for decades has given away billions of dollars of his fortune to support causes of a liberal “open society” worldwide.

The Hungarian premier has often vilified Soros, whose ideals are squarely at odds with Orban’s view that European culture is under an existential threat from migration and multiculturalism.

Orban has often said NGOs are doing Soros’ bidding.

“The government is always looking for someone to fight with, and Soros seems like a perfect person for this because he funds NGOs in Hungary and he funds CEU as well,” Klopfstein said.

CEU Rector Michael Ignatieff has said the school would continue operations as normal and demanded that the law be scrapped and additional international guarantees of academic freedoms be added to current legal safeguards.

The U.S. State Department will send diplomats to Budapest next week to address the CEU crisis, said Ignatieff, who spent several days in Washington to lobby the U.S. government, lawmakers and the media.

“They want to completely undermine and eradicate what remains of civil society,” Bara Bognar, a 40-year-old finance professional, told Reuters. “This is the first protest I have ever participated in. There is a level at which you must be present, so here I am.”

“The method, the lack of dialogue, the efforts for years to annihilate all democratic institutions, this cannot be the future of us nor our children.”