A monument can be many things. The Eiffel tower and The Holocaust Museum in Washington D.C. are two examples of extremely effective monuments that are completely different. The Eiffel is a multi-faceted monument, symbolizing more than one point in French History. The visitor can thusly, make his or her own interpretation because it’s not a representational image of image of a certain point of French History. In my opinion, I think it may be easier to remember what the monument is supposed to represent because the image is so striking.
The Holocaust museum in D.C. also uses striking imagery to help people remember the Holocaust. Although, the imagery is definitely more grounded in realism the images being shown aren’t necessarily the grossest and goriest images. They are more clever in their depiction of the event, making it easier to remember.