
Karl and Theo Albrecht are thought to be worth over €16 billion each. Their ever increasing lead is comfortably ahead of anyone else in Germany.
And all this from a single small food shop founded in Essen in 1948.
In 1961 the Aldi chain of supermarket stores split into two sister companies - each belonging to one of the brothers. This occured partly over a dispute whether to sell cigarettes at the checkout. Aldi Nord, owned by Theo, deemed tobacco sales to be acceptable. Aldi Süd, owned by Karl, deemed they were not.
The chains initially covered the respective different regions of Germany. They've since expanded into other European countries as well as America and Australia.
Incidently, Friedrich Karl Flick, who died last week, was 13th in the Germany rich list with a fortune of €6 billion.