The death camp in Poland was the most infamous of the string of death camps set up by Germany's Nazis. More than one million people, most of the Jews, died there, the majority in gas chambers.
Many Austrians supported Hitler and some of the Nazi dictator's key associates were Austrians.
The Austrian donation is part of a target of €120 million ($160.5 million) earmarked internationally to maintain the site. Germany, about 10 times Austria's size, has agreed to contribute €60 million ($80.26 million).