Inscription
Epitaph
noun, の adjective
The writing on a tombstone makes up the inscription or epitaph the family members decided to put there.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
この慰霊碑の碑文は誰が考えたのですか。
Who thought of the inscription for this memorial?