Like the nearby city of Pompeii, Herculaneum is famous as one of the few ancient cities to be preserved more or less intact, with no later accretions or modifications. The thick layer of ash that blanketed the town also protected it against looting and the elements. Unlike Pompeii, the mainly pyroclastic material that covered Herculaneum carbonized and preserved more wood in objects such as roofs, beds, and doors, as well as other organic-based materials such as food and papyrus.