36 THE ATRIUM VEST. 
cases,’ made easy by their dissimilarity in methods of construction as well 
as by their structural independence. ‘This structural independence is 
especially noticeable at the points of juncture of the new walls with the 
front wall of the rooms on the east. On the north, where the concrete 
foundations of the small court project 60 centimeters beyond the face of 
this wall, the later wall has been built against and on top of them.” Ina 
similar manner on the south a shelf, which extended along the front of 
the earlier rooms, has been utilized in building the new walls.* The relation 
of the walls to each other is most clearly shown by the similarity in archi- 
tectural plan of the two groups as well as by their structural unity.‘ 
By the addition of the new groups of rooms on the north and south and 
by the extension of the front wall of the older court towards the east, the 
two parts of the Atrium were united into one and the building assumed a 
more symmetrical form. The earlier independence of the parts was still 
recognized, however, in the separation between the court and the garden. 
By the changes just mentioned, as well as by the destruction of the earlier 
rooms on the north which had been left untouched in the preceding periods, 
the eastern end of the building was much altered in appearance and the 
irregularity in the position of the exedra became apparent.’ In the older 
parts of the building on the west, little change took place, except the raising 
of the level in one or more of the rooms, of which mention has been made.*® 
The new rooms may, for convenience of treatment, be divided into four 
groups: (1) the group of rooms on the north,’ (2) the group on the south,° 
(3) the series of half-story rooms in the rear of the court on the south,® 
which we shall call the mezzanino, and (4) the rooms of the second story.” 
The Group of Rooms on the North: The group of rooms on the north” 
was modeled in its general features on that adjoining it towards the west, 
with which it was united by the narrow corridor which connected the whole 
series of rooms on that side of the building.” Although it has suffered much 
from later restorations, it is clear that the group consisted of two smaller 
and two larger rooms opening upon the common corridor. The corridor 
itself, which is 2.66 meters wide, was connected with the garden outside by 
a door 2.66 meters in width and by four lofty windows. The two smaller 
rooms are 4.90 meters long and 3.46 and 4.06 meters wide. The two larger 
rooms beyond, which are too much injured to be restored with certainty, 
are now 13.90 meters long and 4.60 and 4.76 meters wide. The two small 
1 Owing to the use of similar materials, the original Plan D. Cf. plan C and p. 30. 
walls of Hadrian are at times difficult to 6P. 27. 
distinguish from the later restorations. 7 Plan D, 8-12. 
2 See plate vi, fig. 2. 8 Plan D, 31-35. 
3 At the southeast corner of the later court. ® Plan D, 24-30. 
4The walls form but one structural unit. The Plan F a. 
two sides are united by the front wall of the Plan D, 8-12. 
shops in the rear of the buildings (plan D, The new rooms with the older ones toward the 
m'-m"). west form practically a single group. 
