I found out later that the emperor Tu Duc built Tu Hieu Pagoda for a monk who had been summoned for breaking the law. He was buying fish from the market, which is illegal for monks. When asked why, the monk explained his mother was sick and the healer had told him she must eat fresh fish every day. Caught in an ethical dilemma, the monk’s love for his mother won out. This story touched the sensitive emperor, who also loved his mother. Thus Tu Hieu was built. Complete with a little pond full of catfish at the entrance.