poem monument; stone monument engraved with a poem
Refers to a stone monument (stele, gravestone, etc.) that has a poem carved into it. Common in literary or historical contexts.
In the park stands a poem monument engraved with a haiku by Basho.
この詩碑には万葉集の歌が彫られている。
This poem monument has a poem from the Manyoshu carved into it.