This is posted in the waiting room of an Irish hospital. Interesting glimpse into their culture.
The full text of the poster
This symbol has been developed by the Hospice Friendly Hospitals Programme to respectfully identify the End of Life.
This symbol is inspired by ancient Irish history; it is not associated with any one religion or denomination.
The white spiral represents the interconnected cycle of life, birth, life and death.
The white outer circle represents continuity, infinity and completion.
Purple has been chosen as the background colour as it is associated with nobility, solemnity and spirituality.
In this hospital the symbol may be displayed on a ward to add respect and solemnity during end of life or following the death of one of our patients.
I'm pretty sure that's the void from league of legends