Anton Webern - Part III (Correction)

The photo I posted on January 12 of what I thought to be Anton Webern's grave marker is most likely a commemorative plaque instead.  A subsequent Google search by another reader has led to a picture of what is surely Webern's grave in Mittersill, Austria.  Now I need to write the mayor of Mittersill to ask if she/he knows if the plaque is perhaps affixed to Webern's home.