What is the purpose of a sima in classical architecture?

In classical architecture, a sima serves a functional purpose as a gutter, effectively collecting and directing water away from the roof of a building. This is particularly important in preventing water damage to the structure and maintaining the integrity of the materials used in construction.

The sima typically runs along the edge of the roof, where it can channel rainwater into downspouts or away from the building, ensuring proper drainage. This aspect of the sima reflects the practical engineering considerations present in classical design, where creating a durable and weather-resistant structure was essential for longevity.

While other elements of classical architecture may serve aesthetic roles or structural support functions, the sima's primary role as a water collection system highlights its unique contribution to both form and function in architectural design.