Marble on the walls looks spectacular, but because of its porous structure the stone will need permanent protection with the help of water-repellent liquids.
London builders: Marble is a glittering stone. Part one.
During several thousand years it has preserved the right to be considered a decoration material, shiny in every way.
London builders: Marble is a glittering stone. Part two.
Using cement grout or adhesive leads in some period to appearance of irremovable spots on the marble surface