When I spotted it on the other side of the road, I almost decided to give it a pass. It was raining, and I was eager to go home to change to go for dinner with my sister. But my curiosity got the better of me, and I decided to investigate. And I am so glad I did.
It turned out to be dedicated to the monkey king (齊天大聖，孫悟空).
The monkey king takes centre stage, with the pig (悟能, 猪八戒) to the right, and the grisly monk (悟净, 沙僧) to the left.
The concept behind the worship of the monkey king is rather fascinating. The three characters are obviously fictional characters in the 16th century Ming Dynasty novel Journey to the West (西遊記). While the characters may be vaguely based on some original legend, the idols worshipped in the temple are obviously based on the fictional characters. How could a fictional character become a buddha/god?