More Innovations. The period after Hadrian's death in 138 C.E. does not mark a decisive break with the past, but under the Antonines (138-93 C.E.) and Severans (193-235 C.E.) certain differences emerge in Roman art and architecture. Innovations often appear in the provinces, such as in the Market Gate of Miletus (circa 160 C.E.) with its rhythm of recesses and projections that "break" the central pediment, and develop the facades of theatrical backdrops. There is also an increase in plebeian imagery, and generally more schematic, less illusionistic techniques in frieze sculpture that anticipate Christian and Byzantine styles. The Severan period produced more impressive architectural achievements than did the Antonine both within Rome and the provinces. Among these are the arches to Septimius Severus (emperor 193-211 C.E.) and Baths of Caracalla (emperor 211-217 C.E.) in Rome, as well as...