The writing on the middle one says: 1972, HJ Rosenberger built the first Rosenberger Fastlane restaurante here in St. Pölten.
These rocks from the Woodquarter (?) were built here on his memories and his life accomplishements.
"Every way in mountains unbeknown to us acknowledges an old experience: The highest and the lowest granit be it, that's building our earth." (Goethe)