The specialised workers excelled in woodworking, as each element of various shapes and sizes is cut, assembled and worked according to a precise order and technique, demonstrating an extensive knowledge of the physical and mechanical characteristics of the materials used. In fact, the interlocking of the elements that form a stable, self-supporting and balanced mechanism is skilful. The wood used in the ceiling ranges from fir, black pine, poplar and beech. It’s like you can still smell the scent of freshly cut fir trees. It could be a Sicilian type: the Abies nebrodensis.