I think armor, clothing, and shields with deity and other symbols would be great. Engraved in plate mail, stitched into leather armor, etched in shields, embroidered in robes, and more. Though we already have this with cloaks.
Deity symbol tattoos would be good too. Deity symbol shaped scars and even symbols cut into flesh for very devout followers.
Paintings, mosaic tiles, and door/wall cravings sporting deity symbols would great as well.
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