The Lawn is used to refer to the grassy field around which the original university buildings are arrayed. The Lawn consists of four rows of colonnades on which alternate student rooms and larger buildings. The inner rank of colonnades, facing the central Lawn proper, contains ten Pavilions (which provided both classrooms and housing for the University's original professors) and 54 student rooms, while the outer rank, facing outward, contain six Hotels (typically service buildings and dining establishments) and another 54 student rooms. At the head of the colonnades, facing south down the Lawn, is the Rotunda, a one-half scale copy of the Pantheon in brick with white columns, that originally held the University's library.