Rudolf König

While he worked for his father's fur business, he attended lectures at the University of Vienna and acquired astronomical knowledge.

[citation needed] As he had an interest in astronomy, in 1906 he built a private observatory in Vienna, on the top of his house, 12 Kuppelwiesergasse.

The instrument was designed for astrophotography and consisted of Carl Zeiss’ 18 and 21 cm caliber birefringence telescopes on a huge equatorial shelf.

On his observatory, he observed the crater König named after him and completed his study for his deceased friend, the draftsman, and selenographer, Johann Kreiger.

In 1929, after König's death, his widow sold the telescope to the “Bohemian Astronomical Society” to build a public observatory in Prague.