In public inns and large country houses, and also in many of the larger city tea-houses, the customary raised floor is divided by a narrow area, which has for its floor the hard trodden earth; and this area forms an avenue from the road to the heart of the house, and even through the house to the garden beyond. This enables one to pass to the centre of the house without the necessity of removing one's shoes.
Source: tatoeba (10578145)