Trident is a Ukraine National Emblem. The first image of a trident appeared in the 1st century AD.
It is thought that the trident represented the division of the world into three spheres: the earthly, the celestial, and the spiritual as well as the union of the three natural elements of air, water and earth.
The trident was endorsed as the official emblem of Ukraine and the blue and yellow flag as the national flag of Ukraine by the Supreme Rada in 1992.