Focus on this artwork and explain the Description.
This birdbath is constructed from large, smooth stones laid in concentric, circular tiers, set in a thick concrete mortar. The large basin of the bath curves out from a more cylindrical pedestal that slopes out a bit toward the ground. The overall silhouette resembles a chalice. The basin is lined with a coating of concrete and has been re-lined at least once. The most recent layer is made from concrete with a larger aggregate than the finer concrete used throughout the birdbath. There is no drainage or circulation system built into the bath.
cylindrical drainage chalice concrete mortar pedestal concentric