Robert Johann Maria König was born in a city approximately 30 km south of what?
Robert König: Robert Johann Maria König (11 April 1885, Linz – 9 July 1979, Munich) was an Austrian mathematician. Linz: Linz ( ; ] ; Czech: "Linec" ) is the third-largest city of Austria and capital of the state of Upper Austria (German: "Oberösterreich" ). Linz:  It is in the north centre of Austria, approximately 30 km south of the Czech border, on both sides of the River Danube.
Czech border