[Glancing image of a Litfaß Säule in Krakow]
Seeing a Litfass Säule in Krakow invoked childhood memories from Germany in the 50s where these advertisement columns were everywhere.
These were large cylindrical columns made of concrete, erected for the mere purpose of acting as walls for advertisements, such as for concerts, circuses, lectures.
Now with the powers of the internet I finally found out the origin: Ernst Theodor Amandus Litfaß (* 11. Februar 1816 in Berlin; † 27. Dezember 1874 in Wiesbaden), a printer and entrepreneur who proposed this kind of posting to keep walls of buildings free of this blight.