Roider Jackl was a German performer, singer, and folk singer, who performed in Bavarian language.
He became famous in the 1950s especially because of the writing and performing of Gstanzls. A Gstanzl normally consists of four lines, sometimes eight, and is sung in dialect. He performed for example in the Bayerischer Rundfunk and in the Nockherberg. He was a master of the political Gstanzl. Karl Valentin was among his admirers.
Wikipedia https://en.wikipedia.org/wiki/Roider_Jackl
Address 5 Viktualienmarkt, München 80331, Germany
Coordinates 48°8'8.187" N 11°34'35.948" E