Detail of the entablature now in the Capitoline Museums.
The various depths of the different elements of the architrave can be clearly seen here. The roughed-out section sits 4 cm above the finished surface and the guideline strip about 2 cm above and 2 cm down. The finish on the smooth sections of the architrave fasciae can also be seen here. These surfaces were finished with a very smooth border of flat chiselling around their edges framing a surface which is much more roughly flattened with the tooth chisel. This is a relatively common finish on flat architectural surfaces where the edges needed to be smooth and straight but the interior of the block just had to be flat.