The concept of the god-king was fundamental to ancient Egyptian religious and political ideology. As early as the predynastic period (before c.3100 bc) the rulers of Upper and Lower Egypt had associated themselves with the falcon-god Horus and Seth respectively. Once Upper Egypt had successfully conquered Lower Egypt, the pharaoh was the embodiment of the victorious ruler. Narmer, the first pharaoh of the new dynasty, was regarded as the incarnation of Horus who united the two kingdoms and defeated his enemies. The pharaoh's titles reflected this: ‘He of the Sedge and Horus’ as ruler of Upper and Lower Egypt, and ‘Great House’ referring to his palace. The pharaoh's person was sacrosanct and the pharaoh was addressed by his subjects with such titles as ‘your Majesty,’ and ‘Lord of the Two Lands.’ The pharaoh was also identified with the sun-god Re, and took the title ‘Son of Re.’ The pharaoh's life, and especially the health of his body, were of concern to the entire nation, and special precautions were taken to ensure his safety and well-being. The pharaoh's subjects bowed to the ground in his presence and approached him on their knees. The pharaoh was also the supreme religious leader; he played a central role in many ceremonies, and was often represented in religious art offering libations to the gods. The pharaoh was also the owner of all the land in Egypt and received tribute from the conquered lands. The pharaoh was also a skilled and experienced warrior, responsible for the defence of Egypt against foreign invaders. He led his armies in battle and was often depicted in art as a victorious warrior. The pharaoh was also a builder and was responsible for the construction of many temples and other monuments. He was also a patron of the arts and encouraged the production of literature and art. The pharaoh was also a patron of trade and encouraged the development of new trading routes. He also encouraged the development of new technologies and was responsible for the construction of many monuments.