The Preis der Diana is a Group 1 flat horse race in Germany open to three-year-old thoroughbred fillies.
It is run at Düsseldorf over a distance of 2,200 metres (about 1 mile and 3 furlongs), and it is scheduled to take place each year in early August.
It is Germany's equivalent of The Oaks, a famous race in England.
The race was staged at Grunewald for a short period after World War I, and it returned to Hoppegarten in 1923.
The present system of race grading was introduced in Germany in 1972, and the Preis der Diana was initially classed at Group 2 level.