She is the widow of Dutch Labour Party (PvdA) politician Wim Duisenberg, who was also the first president of the European Central Bank.

Gretta Duisenberg was born as Greetje Nieuwenhuizen[1] into a strict Reformed family in Heerenveen, Friesland, where her father worked as a policeman.

Gretta Duisenberg came to international attention in 2002 when the media reported that the president of the ECB had a Palestinian flag hanging from his house in Amsterdam.

Gretta Duisenberg came under fire when she announced her intention of collecting six million signatures as part of her campaign to draw attention to the Israeli occupation of the Palestinian Territories.

[citation needed] In a discussion program aired on Dutch TV in November 2005,[3] she stated she understood suicide bombings in the light of the desperate conditions Palestinians are kept in.

In 2010 the OM saw again no reason to prosecute Duisenberg after allegations of sedition together with members of parliament Harry van Bommel and Sadet Karabulut.

The article, which is still available on her website, states that "The Jews — contrary to the ‘liberal’ views they officially say they profess — in their suppressive acts practically demonstrate that they always seek to dominate the information flow, they don’t tolerate any dissent".