Several thousand people protested against high rents in Berlin on Saturday.
The organizers spoke of 20,000 participants.
The police estimated the number of protesters in the afternoon at a "higher four-digit number," a spokesman said.
The “Berlin alliance against displacement and rent madness”, the Berlin tenants' association and nationwide initiatives against high rents called for a protest.
A spokesman for the Berlin alliance demanded in his speech that all rental companies nationwide must be expropriated.
Housing should not be listed on the stock exchange.
"We at our action alliance are demanding a nationwide rent cap from the new federal government."
The group wants a change of course in rent and housing policy: rent freeze, no conversions into ownership and no redundancies, no evictions, expropriations of large real estate groups, a nationwide rent cap.
Correspondingly, banners at the rally read: “For a city with affordable rents for everyone” and “Tenants, feel your power”.
Representatives of several parties and the German Trade Union Confederation were also present at the demonstration.
Its board member Stefan Körzell demanded on the occasion of the demo that there should be a nationwide six-year rent freeze.
"We are demanding a new housing policy from the new federal government that focuses on more affordable and social housing," he said.
Participants in the demonstration also campaigned for the referendum on the expropriation of large real estate companies, which Berliners will vote on at the same time as the Bundestag and House of Representatives election on September 26th.
If there is a majority for the project, the pressure on the future Senate of the capital grows.
In the past few years, thousands to tens of thousands of people in Berlin demonstrated against high rents. According to the organizers, 10,000 people attended Pentecost. The police then counted 2,500 demonstrators.