Marquis Cai Memorial is originally the residence of Cai Lun, the inventor of paper making skill in Eastern Han Dynasty. People built the memorial in the original place of the residence to memorize Cai Lun. According to Annotation to‘Scripture of Hydrology and Geography’ by Li Daoyuan, “Lei River passes Caizhou in northwest. The west of Caizhou is the original residence of Cai Lun, near where there is Cai Zi Pool.”
It is not exactly known when Marquis Cai Memorial was begun to be built. In 1338 AD, Chen Zongyi, the governor of Leiyang city, rebuilt the memorial. Being destroyed and rebuilt for several times, the building remaining today was rebuilt in Qing Dynasty. It is simple, unsophisticated and elegant. Facing the south, it takes an area of 408 square meters and is of brick-timberwork. There are three layers and two courtyards. In the antehall, there are three small housese with green tile roof. There are corridors in the two sides. The middle axis is a paved path with cover leading to middle hall. There are also three houses in the middle and back halls, connected with walkway and corridor. Over the main door, there is a stone plaque of “Marquis Cai Memoriall”, a stone couplet of “with beautiful pool and shining moon, the style of the original residence remains here”.