Possible Clues:

• The Taj Mahal is one
• Great tomb — usual memo (anag)
• Gold only buried in silent place such as Taj Mahal
• One may lie impressively in this memo — usual nonsense
• Nothing left in exhibition building? Near front, there's a tomb
• Large, stately tomb
• Building for the dead mummy, a superior individual being housed
• Gold alone is kept in silence in gloomy place
• Magnificent tomb or monument
• Gold floor inside quiet gloomy place