#memorial.structure__monument  a structure erected to commemorate persons or events
  supertype:  physical_structure__structure__construction  a thing constructed; a complex construction or entity; "the structure consisted of a series of arches"; "she wore her hair in an amazing construction of whirls and ribbons"
  subtype:  memorial_tablet__brass__bras  a memorial made of brass
  subtype:  cenotaph  a monument built to honor soldiers who died in a war
  subtype:  gravestone__headstone__tombstone  a stone that is used to mark a grave
  subtype:  Lincoln_Memorial  memorial building in Washington containing a large marble statue of Abraham Lincoln
  subtype:  megalith__megalithic_structure  memorial consisting of a very large stone forming part of a prehistoric structure (especially in W Europe)
     subtype:  dolmen__cromlech  a prehistoric megalith typically having two upright stones and a capstone
     subtype:  menhir  a tall upright megalith; found primarily in N France and England
  subtype:  national_monument  memorial consisting of a structure or natural landmark of historic interest; set aside by national government for preservation and public enjoyment
  subtype:  pantheon.memorial  a monument commemorating a nation's dead heroes
  subtype:  pyramid  a massive memorial with a square base and four triangular sides; built as royal tombs in ancient Egypt
  subtype:  Statue_of_Liberty  a large monumental statue symbolizing liberty on Liberty Island in New York Harbor
  subtype:  triumphal_arch__triumphalarch  a monumental archway; usually they are built to commemorate some notable victory
  subtype:  Washington_Monument  a tall stone obelisk in Washington honoring George Washington

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