On the Plan, the dark lines show the remains of Nero's Palace, which
was nearly destroyed by the Flavian emperors. The remains left were
used by Hadrian for the underground part of his thermæ; and by
building walls over the courts and gardens he formed a large platform.
The light lines show his work. The circular wall in front supported
the seats for the stadium attached to the baths above. Remains of some
of the large halls of the baths can be seen in the vineyards above the
House of Nero. Some remains of these baths exist under the Church of
S. Martino. These baths are generally ascribed to Titus; but the
construction, _opus reticulatum_, within bands of brick, shows that
they are of the time of Hadrian.
_Turn to the left on coming out. A short way up the road, on the
right, is the entrance to the_