A historical marker or historic marker is an indicator such as a plaque or sign to commemorate an event or person of historic interest and to associate that point of interest with a specific locale one can visit. Wikipedia

A commemorative plaque, or simply plaque, or in other places referred to as a historical marker, historic marker, or historic plaque, is a plate of metal, ceramic, stone, wood, or other material, typically attached to a wall, stone, or other vertical surface, and bearing text or an image in relief, or both, to commemorate one or more persons, an event, a former use of the place, or some other thing. Wikipedia

A plaque erected at historically significant locations Wikipedia Disambiguation

A plate typically attached to surface and bearing text or an image related to an honoree Wikipedia Disambiguation

A plate or tablet fixed to a wall to mark an event, person, etc. Wikipedia Disambiguation

plate or tablet, fixed to a surface or freestanding, commemorating an event, person, place, etc. Wikidata