BERLIN (Reuters) - Former Chancellor Helmut Kohl, the architect of Germany’s 1990 reunification and mentor to Angela Merkel, has died at age 87, his Christian Democratic Union party (CDU) said on Friday.

FILE PHOTO - German Chancellor Helmut Kohl gestures during an electoral rally in Erfurt for first free elections in East Germany in this February 1990 file photo. REUTERS/Michael Urban/File Photo

The mass-selling newspaper Bild reported that Kohl died at 9.15 a.m. on Friday morning in bed at his home in Ludwigshafen, in western Germany, with his second wife, Maike Kohl-Richter, at his side.

Merkel, Germany’s incumbent chancellor who grew up in communist East Germany before being appointed by Kohl to her first ministerial post, said he “changed my own life path decisively” by reuniting Germany.

“When a new spirit began to stir in eastern Europe in the 1980s, when, starting in Poland freedom was seized, when brave people in Leipzig, East Berlin and elsewhere in East Germany began a peaceful revolution, then Helmut Kohl was the right man at the right time,” said Merkel, who was wearing black.

“He stood fast to the dream and aim of a united Germany even as others hesitated,” she said in a televised statement from Rome.

Germany’s longest-serving post-war chancellor from 1982 to 1998, Kohl was a driving force behind the introduction of the euro currency, persuading skeptical Germans to give up the deutschemark, a cherished symbol of the “economic miracle” of the 1950s and 1960s.

An imposing figure who formed an unlikely personal bond with socialist French President Francois Mitterrand in pushing for closer European integration, Kohl, a conservative, had been frail and used a wheelchair since suffering a bad fall in 2008.

By committing to anchor Germany within Europe under a common currency, he overcame resistance to reunification from Mitterrand, Soviet leader Mikhail Gorbachev and Margaret Thatcher, the British prime minister who feared the return of a powerful, united Germany.

“The maker of a united Germany and Franco-German friendship: with Helmut Kohl, we lose a great European,” tweeted French President Emmanuel Macron, with an iconic picture of Kohl and Mitterrand holding hands at a memorial to the World War One battle of Verdun.

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British Prime Minister Theresa May paid tribute to “a giant of European history” and “the father of modern Germany”.

U.S. President Donald Trump said Kohl was a friend and ally of the United States. “The world has benefited from his vision and efforts,” Trump said in a statement.

Shortly after leaving office, Kohl’s reputation was tarnished by a financing scandal in his center-right CDU, now led by Merkel. Until his death, Kohl refused to identify the donors, saying he had given them his word.

“HELMUT WAS A ROCK”

Tributes poured in from around the world.

Former U.S. President George H.W. Bush said he and his wife Barbara “mourn the loss of a true friend of freedom, and the man I consider one of the greatest leaders in post-war Europe”.

“Working closely with my very good friend to help achieve a peaceful end to the Cold War and the unification of Germany within NATO will remain one of the great joys of my life,” he said in a statement. “Helmut was a rock.”

Former U.S. Secretary of State James Baker, who worked with Kohl to negotiate the peaceful reunification of Germany, said: “The United States has lost one of its best friends and the world has lost a ringing voice for freedom.”

The Kremlin said Russian President Vladimir Putin had sent condolences to Germany’s president and to Merkel and cited him as saying Kohl “will be remembered in Russia as a resolute supporter of friendly relations between our countries”.

In Brussels, European flags were lowered to half-staff in tribute.

European Commission President Jean-Claude Juncker, who served as Luxembourg’s prime minister while Kohl was in office, tweeted: “Helmut’s death hurts me deeply. My mentor, my friend, the very essence of Europe, he will be greatly, greatly missed.”

At home, Kohl is celebrated above all as the father of German reunification, which he achieved after the November 1989 fall of the Berlin Wall. He won voters in bleak communist East Germany by promising them “flourishing landscapes”.

Kohl, along with former European Commission chief Jacques Delors and Jean Monnet, founding father of the European project, are the only three people the EU has made Honorary Citizens of Europe, an honor bestowed for extraordinary work to promote European cooperation.