Thousands join rallies pro-Europe rallies across Germany

Supporters wave a European flags attending a rally of the Pulse of Europe movement in Frankfurt, Germany, Sunday, March 19, 2017. Pulse of Europe goes to the streets equipped with the symbols of Europe, flags and Ode to Joy. The protesters take a stand for Europe in public for everyone to see. (AP Photo/Michael Probst) (The Associated Press)

Three young girls wrapped in European flags attend a rally of the Pulse of Europe movement in Frankfurt, Germany, Sunday, March 19, 2017. Pulse of Europe goes to the streets equipped with the symbols of Europe, flags and Ode to Joy. The protesters take a stand for Europe in public for everyone to see. (AP Photo/Michael Probst) (The Associated Press)

Supporters wave a European flags and hold a poster reading 'yes' as they attend a rally of the Pulse of Europe movement in Frankfurt, Germany, Sunday, March 19, 2017. Pulse of Europe goes to the streets equipped with the symbols of Europe, flags and Ode to Joy. The protesters take a stand for Europe in public for everyone to see. (AP Photo/Michael Probst) (The Associated Press)

Thousands of people have joined rallies across Germany and other European countries to show their support for the idea of a united Europe.

The weekly protests began last year as an attempt to counter growing nationalist sentiment on the continent, often expressed in opposition to the European Union.

Protesters in Berlin, Frankfurt, Cologne and dozens of other locations danced, sang and waved the EU flag — 12 stars on a blue background — during the rallies Sunday.

The protests are organized on social media by a group calling itself Pulse of Europe .

The group says it isn't tied to any particular political party.