การศึกษาพระเจดีย์ซึ่งมีพื้นที่ใช้สอยภายในสมัยรัตนโกสินทร์เพื่อการออกแบบพระมหาธาตุเจดีย์ป่าสักชลสิทธิ์ จังหวัดลพบุรี / นภัส ขวัญเมือง = The study on useable interior of a chedi in Rattanakosin period to design Phramahathatchedi Pasak Jolasid, Lop Buri Province / Napat Kwanmuang
The purpose of this study was to apply the findings to the design of Phramahathatchedi Pasakchonlasit. This study focused on the useable interior of chedis, or stupas, in the Rattanakosin period (1782-2003) and was divided into 2 parts: chedis built in the early period and those built in the later period. The former were not built with reinforced concrete while the latter were. The data obtained was categorized into the following: background, site, architectural design, useable interior, decoration, proportion and structure, ventilation, and interior lighting. It was found that the early chedis were built in response to a royal command of the king, and his relatives or high-rank officials to pay homage to the Lord Buddha. The chedis were located on a horizontal axis with the ubosot, chapel, and the viharn, ordination hall, built in a bell shape since the reign of King Rama IV. The principle chedis were normally bigger and decoration varied according to the trend of that time. The chedis usually housed a relic or image of the Lord Buddha in the center. Since it was difficult to leave openings in the wall, ventilation and incoming light were poor, and the interior decoration was difficult to do. The chedis in the later period were built by local people to pay respect to their dead relatives. The chedis were located north of the ubosot or viharn and were built in a bell shape with a more elaborate base. Their architecture and decoration were often the work of architecture students. Symbols included the initials of the kings or an image of Lord Buddha designated for the birthdate of certain kings as well as the images indicating the celebration of the chedi construction. A base area of the chedis during this period was used more than that in the early period. The chedis in this latter period were also built using a modular system, as a result, they were bigger than those of the early period. The results of the above mentioned study, including results from architecture at the site of the chedis, the coronation ceremony and H.M. King Bumiphol Adulyadej's autobiography, were used to design Phramahathatchedi Pasakchonlasit, which houses a smaller chedi holding Buddha relics and images related to the King. There are also paintings commemorating the golden jubilee of H.M the King's ascension to the throne. The architecture of this chedi is Lopburi style and shows the uniqueness of the area. It is built in a bell shape, which is one of the most distinctive features of chedis from the Rattanakosin period.