Relic is a mythical, holy object that grants special abilities to the army that holds it. Relics appear on the map during the exploration of new province tiles. In total, the game involves n+1 relics, where n is the number of players.
Relics can be taken and carried only by military units, no more than one relic per unit. Such a relic is considered yours, and a relic controlled by an enemy unit is considered foreign.
Your relic is active when it is in a province under enemy control, otherwise it is inactive. The active relic brings coins and Glory at the end of each round, and allows you to use its unique power.
Whether active or not, a relic permanently improves your army's performance in battle and when overcoming adversities. It also helps spread your religion and hinders the spread of foreign religions in the province where your army with the relic is located.
Many cultural achievements are tied to relic control, making it one path to victory.