The Urn of Andraste is a sacred relic which contains the ashes of the prophet Andraste. They were carried to the mountain from the Tevinter Imperium by a disciple named Havard, who saw no other place fit for her burial place. Since then, the relic was protected by the Disciples of Andraste.
During the events of the Fifth Blight, the Warden during The Urn of Sacred Ashes quest must find the urn in order to use the ashes' alleged healing power to heal Arl Eamon Guerrin and after taking a Pinch of Sacred Ash, can either leave the urn be or destroy it by filling it with dragon blood, as requested by the local Cult, The Disciples of Andraste, who believe the urn is an obstacle in the way of Andraste's completing her rebirth as a High dragon.An alternative possible explanation for the Ashes' miraculous powers of healing is provided by Oghren. Lyrium veins run deep within the caverns in which the Urn is housed, and thus its constant exposure to them could have infused the remains with magical power.
See also EditTears of Andraste
A small crystal vial filled with a clear liquid, allegedly the tears of Andraste that she shed for humanity.