Emblem of the Royal House of Chakri, the ruling Dynasty of Thailand (formerly Siam), founded in 1782. The Emblem depicts a 'Chakra' (disc) and a 'Trisula' (trident) intertwined.  Both of these objects are weapons of Vishnu (of which the Kings of Siam believe themselves to be 'Avatars'). The symbols also directly relate to King Rama I's pre-coronation title of "Chao Phraya Chakri", which in itself is a combination of the word 'Chak' and 'Tri', thus denoting the two weapons.
Own work by uploader, inspired by artwork created more than 200 years ago, based directly from:[1] and File:Bkkchakrisymbgpalace.jpg, the halo is from this picture:[2].
This W3C-unspecified vector image was created with Inkscape .