Zhou Kong, or the Duke of Zhou, was the brother of the 1st king of Zhou which replaced the Shang dynasty. He is credited with writing down the 64 hexagrams used in the I Ching.
The temple had obviously been renovated in the recent past when I visited. It seemed to me to be in much better shape overall than even the Temple of Confucius. Maybe it just looked better in comparison to Yan Hui's temple, which I visited the day before. It was newly painted and things did not seem to be slowly moldering away in the heat and humidity, at least.