Marble in architecture is the premiere ostentatious element. Often, marble is reserved for dwellings of authority and power (government, big business, stately mansions, etc.). If you are fortunate enough to occupy the building, it may be that you are feeling a special allegiance with power structures. If you are occupying a corporate or government building, it may be a representation of power that you feel in daily living. The people who come to visit you in these structures are central to understand the meaning of the dream. If you are living in a marble mansion, you may be on the verge of a successful business venture.
If you are visiting these places, note the feeling they arouse in you.