Protesters in Berlin gathered outside CDU headquarters.Thousands of demonstrators gathered in Germany on Thursday to protest the conservative Christian Democratic Union and Christian Social Union parties.

A who's who of German talent signed an open letter calling for political leaders to "uphold democratic values" after a historic vote in the Bundestag that saw anti-immigration proposal pass with the support of the far-right.

The AfD party is polling at about 20% before Germany's February 23 elections, a record for a party. The mainstream conservative CDU/CSU alliance leads with about 30%.

Tens of thousands of people took to the streets in cities across Germany on Thursday after a controversial motion demanding migration reforms was passed in parliament the previous day with support from the far-right Alternative for Germany (AfD).

Hundreds of people gathered outside the headquarters of Germany's opposition Christian Democrats (CDU) in Berlin on Wednesday evening to protest against the conservative bloc pushing through a motion to tighten migration policy with the help of votes from the far right.

Protesters in Germany on Thursday rallied against the conservative CDU party to decry its cooperation with the far-right AfD in pushing through parliament a motion to demand a crackdown on immigration.

Thousands of people gathered in front of the headquarters of Germany's Christian Democrats (CDU) in Berlin on Thursday evening after it relied on the far-right Alternative for Germany (AfD) to pass a divisive motion in parliament the day before.