Phra Kiao, the personal insignia of King Chulalongkorn and the emblem of Chulalongkorn University, which is named after him. This image is a derivative work from the regulation on uniform for CU personnel which is published in the Thai Government Gazette. Therefore, this work is not eligible for copyright, but the usage is governed by other laws.
There are a number of variations of this emblem (different in crown components, hanging brushes, pillow and so on.) in order to meet aesthetic purposes.
Self-drawn based on http://www.ratchakitcha.soc.go.th/DATA/PDF/2553/E/005/41.PDF, but with completely different style of drawing.
Anachak Udrach