From the UUA’s Flaming Chalice: Symbol of Unitarian Universalism https://www.uua.org/beliefs/who-we-are/chalice

A flame within a chalice (a cup with a stem and foot) is a primary symbol of the Unitarian Universalist faith tradition. Many of our congregations kindle a flaming chalice in gatherings and worships and feature the chalice symbol prominently. 

Hans Deutsch, an Austrian artist, first brought together the chalice and the flame as a Unitarian symbol during his work with the Unitarian Service Committee during World War II. To Deutsch, the image had connotations of sacrifice and love. Unitarian Universalists today have many different interpretations of the flaming chalice, including the light of reason, the warmth of community, and the flame of hope. 

Our current official UUA logo debuted in 2014, offering a visual representation of a modern and dynamic faith. Unitarian Universalist congregations are free to use the UUA’s logo in their congregational work, but they are not required to do so. Because of this, you may see many different styles of flaming chalices and other images used by Unitarian Universalist congregations.