1 A statue, building, or other structure erected to commemorate a notable person or event.
1.1 A statue or other structure placed over a grave in memory of the dead.
1.2 A building, structure, or site that is of historical importance or interest.
1.3 An enduring and memorable example of something.
Middle English (denoting a burial place): via French from Latin monumentum, from monere ‘remind’.
Every year, more monuments get put in place to remind us just how many horrible things humans do to one another, though that’s not the stated reason.