Final answer:
The triumphal arch is a feature in Early Christian architecture that symbolizes the victory of Christianity. The apse in a church is similar to the apse in a Roman basilica in shape, but differs in its purpose and decoration.
Step-by-step explanation:
In Early Christian architecture, the term "triumphal arch" refers to an architectural feature that was often present in churches. It is a grand archway located at the entrance of the apse and is usually decorated with religious imagery and symbolism. The triumphal arch symbolizes the victory of Christianity and serves as a focal point within the church.
The apse in a church is both similar to and different from the apse in a Roman basilica. Both apses are semi-circular in shape and are located at one end of the building. However, the apse in a church is typically larger and more ornate, as it serves as the holiest part of the church where the altar is placed. In contrast, the apse in a Roman basilica was used for legal proceedings and displayed the political authority of the Emperor.