This path starts just outside Vienna and ends in Mariazell. It should be walkable in 4-7 days and looks very pleasant.
Some other resources:
http://www.via-sacra.at/index.php
https://www.routeyou.com/en-at/route/view/1360628/hiking-route/via-sacra-overview
Some other resources:
http://www.via-sacra.at/index.php
https://www.routeyou.com/en-at/route/view/1360628/hiking-route/via-sacra-overview
