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Khun Chaiya (active between 1860 and 1916) was a Royal Court photographer in Siam (now Thailand).
Between 1860 and 1879, Chaiya photographed the ruins of the `Utthayan Prawattisat Phimai (also known as Prasat Hin Phimai) temple in what is now Phimai Historical Park, Phimai, Thailand.
- Canadian Centre for Architecture; Collections Online, s.v. "Chaiya, Khun", cited 6 February 2006.
- Canadian Centre for Architecture; Collections Online, "View of the ruins of the `Utthayan Prawattisat Phimai", PH1982:0643:159, cited 6 February 2006.
- Döhring, Karl. 'Buddhist Temples of Thailand: An Architectonic Introduction' (1920; reprint, Bangkok: White Lotus Press, 2000), p. ix; p. 181, fig. 8.