This deserted monastery is located on the city island within the Ayutthaya Historic Park. It can be easily visited on foot or by bicycle. Motor vehicles are not allowed to access it.
There are three main structures in situ at Wat Langkha Dam. These restored structures have mostly been built toward an east/west axis. In front is a small, roofless, sermon hall. The entrance is on the eastern side and there are a few small windows for ventilation. There are traces of an altar and stubs of pillars inside. No Buddha images are present. Behind this sermon hall is a bell-shaped chedi in the style associated with the middle- Ayutthaya period. It has an octagonal base with several layers leading to its relic chamber. There are at least 11 rings around the spire. The finial is gone, but the harmika is still in good shape. There is still plenty of stucco remaining. A second chedi can be found on the northwestern side of the sermon hall. Its architectural style dates to the Late Ayutthaya period. Although this chedi has significantly eroded, there are hints of a Khmer influence. There are several indented corners around this chedi. An arched niche is visible at the relic chamber, but this has been plundered leaving a hole. In addition, traces of monastery walls are in situ as well as some renovated chedi. These are only viewable at the basic ground level.
There isn’t much known about the history of Wat Langkha Dam. It was named after the black tiles on its roof. Given the similarity in names, this monastery probably had some connection with Wat Langkha Khao. The two temples were separated only by a small moat, and the same road passed in front of both monasteries. Wat Langkha Dam was also situated along Klong Nam Cheawn - a canal that brought fast moving water from Khlong Mueang (the old Lopburi River) to Bueng Phra Ram. The water flow of this canal was regulated by a gate known as Pratu Tasibiay. A portion of the gate’s wall can still be seen along U-Thong Road. This canal was aligned with a number of temples: Wat Langkha Khao, Wat Chum Saeng, Wat Yan Sen, Wat Sangkha Pat, and Wat Phong.
Text & photographs by Ken May - August 2009
The water flow of Khlong Nam Chiao was not regulated by the gate known as Pratu Tha Sip Bia (the Gate of the Landing of the Ten Cowries). This gate was a large land gate in the northern city wall situated near the northeastern corner of the outer wall of Wat Thammikarat. Following Phraya Boran Rachathanin (PBR) the Nam Chiao canal entered the city two entries further to the east at an entrance called Chong Maha Thera Mai Sae. The canal aligned with Wat Chum Saeng, Wat Langkha Khao, Wat Langkha Dam, Wat Sangkha Pat, and Wat Phong mentioned above, was called Lam Khu Pak Sra.  This author believes that the local people could have called the latter Khlong Nam Chiao, but this is in contradiction with PBR's writings.
อธิบายแผนที่พระนครศรีอยุธยากับคำวินิจฉัยของพระยาโบราฌราชาธานินท์ ฉบับชำระครั้งที่๒และภูมิสถนกรุงศรีอยุธยา (2007) - Explanation of the map of the Capital of Ayutthaya with a ruling of Phraya Boran Rachathanin - Revised 2nd edition and Geography of the Ayutthaya Kingdom - Ton Chabab print office - Nonthaburi (2007) - page 53.