The last remaining hurdle to the opening up a massive Holocaust archive held in Germany has been cleared after Greece voted to change an international treaty.

The Greek parliament voted unanimously to make the information contained in the Bad Arolsen archive public. Greece is the last of the archive’s 11 governing countries to approve amending the treaty governing the Nazi-era documents.

France voted in favor of the changes last week, and the US, Israel, Britain, Belgium, Luxembourg, the Netherlands, Poland, Germany and Italy agreed to the amendments earlier this year.

Much of the digital information kept in the archive has already been transferred to national Holocaust repositories in countries such as the US and Israel, but previously this information was only available to Holocaust survivors and their families.