The Vichayen House was built around 1685 to accommodate Western ambassadors visiting King Narai the Great. Later, King Narai granted this residence to Phra Chao Phraya Vichayen (Constantine Phaulkon), a Greek nobleman and one of the king's favorites. The property is extensive, divided into three parts. The western section served as accommodation for the French envoy, while the central area features a bell tower and a Christian church located at the back. The entrance archway displays a gabled design, and the eastern side is characterized by a semi-circular staircase leading up to the entrance, which is also semi-circular in shape. At the back, there is a water storage tank, and in front, a grassy lawn complements the architecture. Some sections of the residence exhibit a truly European architectural style befitting royal hospitality for diplomats. Admission fees are 10 Baht for Thai citizens and 30 Baht for foreign visitors.