The gate of the museum re-opened after Karl Marx's descendants cut off a red band on a ceremony Saturday morning, after about five months of renovation.
Besides the full renovation, the museum also presents a new permanent exhibition named From Trier to the world: Karl Marx, his ideas and their impacts until today.
The new exhibition gives more spaces to the impacts of Marx and his ideas, especially the world after the 2007 global financial crisis.
"We want to show these ideas are still alive, these ideas up to date," Elisabeth Neu, head of the museum, told Xinhua.
Among the new exhibits included an armchair in which Marx died on March 14, 1883.
The very first edition of Communist Manifesto in 1848, and a Wealth of Nations by Adam Smith, which supposedly inspired Marx for writing Das Kapital.
Marx was born in this house in Trier on May 5, 1818 and spent the first 17 years of his life here. He died in London in 1883.
The city is now holding a series of ceremonies to memorize the great thinker.
* People in European cities paid homage to Karl Marx on May 5, marking the 200th anniversary of the great thinker's birth.
In London, the Marx Memorial Library organized an international conference celebrating Marx's work and exploring the significance of Marxism in the world today.
Speakers at the conference include John McDonnell, British Shadow Chancellor of the Exchequer. His speech subject is Marxism as a force for change today.
In the Finnish city of Pori, works of Karl Marx were read aloud at the market square.
Juha-Pekka Vaisanen, chairman of Finnish Communist Party, told the shoppers that neoliberal economic policies have decisively contributed to the "resurrection" of Marx as a popular phenomenon.
Vaisanen has been touring Finland this spring giving public readings of Karl Marx.
In his address in Pori, Vaisanen referred to Chinese leader's suggestion that reading of Marx could become a habit.
Vaisanen underlined that Marx is not only relevant for the economists, but for everyone at a time "when the robots may snatch your job", and "the robots do not need social security".
Finnish Communist Party has recently published again in Finnish language parts of Das Kapital, the masterpiece of Marx. "Students told us that the books were in libraries but sold out in stores for decades," Vaisanen said.
* The National Museum of China on May 5 opened an exhibition to mark the 200th anniversary of Karl Marx's birth.
"The Power of Truth" features Marx's life, sinicized Marxism and Marxism-themed contemporary art.
On display are manuscripts by Marx, Engels, Lenin; documents, books, photos; and 70 Marxism-themed art pieces.
The exhibition was sponsored by the Publicity Department of the Communist Party of China (CPC) Central Committee, a history research institute under the department and China Federation of Literary and Art Circles.
The exhibition will run for three months.
* A China-donated statue of German philosopher Karl Marx was unveiled on May 5 in his birth town on the 200th anniversary of his birth.
