A Jewish organization has launched a database aimed at helping thousands of Holocaust survivors or their heirs regain property lost in Warsaw due to World War II and communism.

Under a new Polish law, people will have just six months to file claims for more than 2,600 properties in Warsaw after those properties are listed publicly in a newspaper, something expected to happen soon. Not all of the properties belonged to Jews, but it is believed that many of them did.

Claimants who fail to come forward by the deadline will forever relinquish their rights to any restitution, with the city to assume permanent ownership of unclaimed properties.

“There is now a very limited opportunity for some kind of justice for people who suffered so much,” said Gideon Taylor, chair of operations for the World Jewish Restitution Organization, which created the database.

The new law, which entered into force in September, affects people who had property in Warsaw that they tried to reclaim after the war. At that time, the communist regime seized much of the prewar property, of Jews and non-Jews alike, making it impossible in practice for anyone to reclaim it until communism fell in 1989.

In the years since then, some original owners have reclaimed lost property in complicated legal proceedings, but it has been more difficult for the Jews who fled Poland and settled abroad.

As the problem continues to fester, the city of Warsaw this year compiled a list of 2,613 street addresses that will be open to be claimed, but does not give the names of the original owners.

The new database matches the street addresses with the names found in historical records.

Taylor says it’s not clear how many of those properties were Jewish, but he believes a significant number must be because Warsaw was 30 percent Jewish before the war and Jews were well-represented in the professional and property-owning classes.

Before the war Poland was home to about 3.3 million Jews, the largest Jewish community in Europe and the second-largest in the world after the United States. Most of them perished in the Holocaust.

Poland is the only European Union country that has so far failed to pass a national law that returns property to Holocaust survivors and the others dispossessed by the war or communism.

(AP)