sentence: column , often topped with a statue -- such as trajan 's column in rome , nelson 's column in london and berlin victory column eternal flame that kept burns continuously , usually lit to honor unknown soldier -- such as russia 's tomb of unknown soldier fountain , a water-pouring structure usually placed in a formal garden or square -- such as fontaines de la concorde and gardens of versailles grave stone constitute small monuments to the deceased -- such as the tombs and vaults of veterans in les invalides and srebrenica genocide memorial .