Lu Ban (–444BC) was a Chinese architect or master carpenter, structural engineer, and inventor, during the Zhou Dynasty. He is revered as the Chinese Deity (Patron) of builders and contractors. Life Lu Ban was born in the state of Lu; a few sources claim he was born further to the west, in Dunhuang, to a family of carpenters or artisans during the Spring and Autumn period of the Zhou dynasty. His original name was He was also referred to as or Pan. He was supposed to have been an indifferent pupil until his love of learning was kindled by the scholar Zi Xia. He later learned woodworking from Bao Laodong. The great demand for his work supposedly compelled him to invent or improve several carpenter's tools—the saw, the square, the planer, the drill, the shovel, and an ink marking tool—to complete his many projects more quickly. His wife was also credited with inventing the umbrella in order to permit him to work in inclement weather. Inventions According to tradition, he was responsible for several inventions: Cloud ladder—a mobile, counterweighted siege ladder. Grappling hooks and ram—implements for naval warfare. Wooden bird—a non-powered, flying, wooden bird which could stay in the air for three days. It has been suggested to be a prototype of a kite. The saw. Legend has it that when Lu Ban was grabbing hold of tree trunks in order to climb a steep slope while gathering firewood, his hand was cut by a leaf with spiny texture. He then realized that he could turn the leaf's texture into a more efficient tool for tree-cutting, namely the saw. Other inventions were also attributed to him, such as a lifting implement to assist with burial, a wooden horse carriage and coachman, a pedal-powered cycle, and other woodworking mentioned in various texts, which thereafter led Lu Ban to be acknowledged as a master craftsman: The Book of Lineages (Shiben), written c. the 3rd century BC. The Tales of the Marvelous (), by Ren Fang, written c. the 5th century AD. The Records of Origin on Things and Affairs (), by Gao Cheng, written c. the 11th century. The Origin on Things (), by Luo Qi, written c. the 15th century. The Treatise of Lu Ban (), attributed to Lu Ban, written in the 13th, 14th, or 15th century. Legacy Lu Ban is revered as the god of carpentry and masonry in