The Phlapphla Chaturamuk pavilion was made of wood. It was located in the north-east of the palace. The pavilion was built on the foundations of an ancient building belonging to the palace before the fall of Ayutthaya. the structure consisted of two connected pavilions with a two-tiered roof . The building was the residence of King Rama IV when visiting Ayutthaya and included a throne-hall. The pavilion had six gables with different decorations based on the King’s emblem. In 1904, this building was changed into a museum. During the reign of King Rama VII, Phraya Boran Rachathanin repaired the pavilion.The whole structure was broken down and rebuilt with new material. The shape of the building was slightly changed.