The High Altar in the Church at Melk Abbey
"The meaning of the Melk Abbey Church can be seen in the inscription on the high altar: “NON CORONABITUR NISI LEGITIME CERTAVERIT” (“Without a legitimate battle there is no victory”) (2 Timothy 2,5). The battle which leads to victory is embodied on the high altar through the martyrdom of the apostles Peter and Paul." From Melk Abbey website.