In the architectural development of facade designs of the Roman Commemorative Arch, the first step was a process of combining arcuated and trabeated systems. This was achieved by two innovations. One was the intorduction of podium (or pedestal) and orders into a simple arched structure. At this stage, the Ancient Romans created two types of facade designs, i. e., the commemorative arches with orders and the podium (or the pedestal), and those with only orders. The other innovation was an exquisite arrangement of imposts, impost-pilasters and the engaged columns as we can see in the Arch of Titus on Velia.