Monuments may be relics of older civilisations, like Egyptian obelisks or the triumphal arches of Rome, or they can be newly built to commemorate an event or a person, perhaps as part of a formal urban or rural landscape. Such monuments will be planned to contribute to the visual appeal of a townscape or park, so they will naturally appeal to artists.
Idealised and romantic landscapes include monuments to contrast with nature; these are often tombs, symbolising the shortness of human life.