What is the name of the temple sanctuary in ancient architecture?

The correct answer, "Cella," refers to the inner chamber of a temple in ancient architecture, particularly in the context of Roman and Greek temples. The cella housed the cult statue of the deity to whom the temple was dedicated and served as the primary space for rituals and offerings. Its design played a crucial role in the religious practices of the time, as it was considered the most sacred part of the temple structure.

The other terms relate to different architectural features but do not specifically denote a temple's inner sanctuary. The "Forum" is an open public square in ancient Roman cities used for various activities including markets and political gatherings. The "Peristyle" refers to a columned porch or courtyard surrounding a building, often found in temples and larger houses, but it does not denote the inner sanctuary. "Portico" describes a structure consisting of a roof supported by columns at the entrance of a building, which helps to create a grand facade but is not synonymous with the inner workings of temple worship. These distinctions highlight why "Cella" is the appropriate choice for a temple sanctuary.