The dig at an old orangery in the palace grounds in the village of Minkowskie is being carried out by the Silesian Bridge Foundation which says it has a war diary written by a Waffen SS officer at the end of the war.
Treasure hunters say they have located 10 tonnes of Nazi gold worth nearly half a billion pounds that was stolen by SS chief Heinrich Himmler at the end of WWII in order to establish a Fourth Reich.
Consisting of 126 sheets and containing 31 of SS monster Jurgen Stroop's daily reports and 53 photographs, the document details the course of the Jewish uprising, a list of the units and people involved in the operation, as well as the reality of fighting in the ghetto.
The Germans planned to turn Auschwitz into a model Nazi town, and in doing so planted trees.
The gold worth billions of euros as well as other valuables are said to be 60 metres underground at the bottom of a disused well in the grounds of the Hochberg Palace in Roztoka, near Wałbrzych. The claim comes from a 75-year-old diary which describes the operation to hide treasure controlled by SS chief Heinrich Himmler.