He also ordered that bodies should be buried in unmarked graves , without coffins or embalming .
It opened in 1784 following a decree by Emperor Joseph II that forbade further burials in cemeteries within the outer walls of the city of Vienna .
Emperor also ordered that bodies should be buried in unmarked graves , without coffins or embalming .
It opened in 1784 following a decree by Emperor Joseph II that forbade further burials in cemeteries within the outer walls of the city of Vienna .