The Hamburger Dom is a large fair held at Heiligengeistfeld fair ground in central Hamburg, Germany. With three fairs (spring, summer and winter) per year it is the biggest and the longest fair throughout Germany and attracts every one approximately ten million visitors per year. It is also referred to as a Volksfest. Hamburger Dom puts on an impressive firework display at the Heiligengeistfeld, that can be seen across most of the city, every Friday that it runs at 22:30 hrs.