Angkor
In the early days of Angkor, the worship of Vishnu was secondary to that of Shiva. The relationship seems to have changed with the construction of Angkor Wat by King Suryavarman II as his personal mausoleum at the beginning of the 12th century. The central religious image of Angkor Wat was an image of Vishnu, and an inscription identifies Suryavarman as "Paramavishnuloka," or "he who enters the heavenly world of Vishnu." Religious syncretism, however, remained thoroughgoing in Khmer society: the state religion of Shaivism was not necessarily abrogated by Suryavarman's turn to Vishnu, and the temple may well have housed a royal lingam. Furthermore, the turn to Vaishnavism did not abrogate the royal personality cult of Angkor. by which the reigning king was identified with the deity. According to Angkor scholar Georges Coedès, "Angkor Wat is, if you like, a vaishnavite sanctuary, but the Vishnu venerated there was not the ancient Hindu deity nor even one of the deity's traditional incarnations, but the king Suryavarman II posthumously identified with Vishnu, consubstantial with him, residing in a mausoleum decorated with the graceful figures of apsaras just like Vishnu in his celestial palace." Suryavarman proclaimed his identity with Vishnu, just as his predecessors had claimed consubstantiation with Shiva.
Royal Barge Anantanakkharat
During the reign of Rama IV (King Mongkut), Anantanakkharat was used as his primary Royal Barge where he stayed The Royal Barge Procession for The Royal Kathin Ceremony (a presentation of Kathin robes and earns merit by honoring and supporting the Buddhist Monks), the movement of the sacred image of Buddha and for important occasions of state. Thailand's Royal Barge Procession (Thai: กระบวนพยุหยาตราชลมารค; RTGS: Krabuan Phayuhayattra Chonlamak) is a ceremony of both religious and royal significance which has been taking place for nearly 700 years. 
The current Anantanakkharat Royal Barge was built during the Reign of Rama VI (King Vajiravudh) and launched on 15 April 1914. The bow is carved into the 7-headed Nakkharat, the mystical snake-like creature, in gold lacquer and glass jewels. The current Anantanakkharat was built to replace the old Anantanakkharat that was damaged. It has been on duty since Rama IV’s reign up to now; however, the major design of the 7-headed Nakkharat remains the same.