The ubosot and wihan buildings during the Early Rattanakosin Period also followed the style of Ayutthaya. In other words, the base of buildings was still curved, such as the ubosot base at Wat Phra Si Rattan Satsadaram or the temple of Emerald Buddha in Bangkok, built in reign of King Rama I and largely restored in the reigns of King Rama III, V, VII and IX. This curved line disappeared later on from Thai architecture.
During the reign of King Rama III, Chinese art was very popular for numerous ubosot and wihan structures were constructed in imitation of Chinese buildings without Thai style roofing decoration. The roof was composed of brickwork, instead of the wooden structural members, and the buildings were embellished with Chinese glazed tiles and coloured pieces of porcelain at various parts such as roofs and gables respectively. Good example is the main edifice of Wat Ratcha Orot in Bnagkok.