Oschon was the patron deity of Nym, hence why you find his symbol here.

There's also 12 stones engraved with the Twelve all around the world. From the top of my head :

(Ice)
- Menphina : Coerthas (West from Steel Vigil),
- Halone : Coerthas (The Fury's Gaze),

(Earth)
- Althyk : South Shroud (in front of Amdapor's Keep),
- Nophica : Gridania (CNJ guild),

(Fire)
- Azeyma : Thanalan (Final Prayer),
- Nald'Thal : Ul'dah (Azzraneth's Ossuary, and there's another in the now inaccessible Milvaneth Sacrarium),

(Wind)
- Llymlaen : Limsa Lominsa (Anchor Deck) ,
- Oschon : Outer La Noscea (south of Kobold Dig),

(Water)
- Thaliak : Mor Dhona (Rathefrost),
- Nymeia : Lower La Noscea (on a cliff south of Moraby Drydocks)

(Thunder)
- Byregot : South Shroud (North West of Camp Tranquil)
- Rhalgr : Southern Thanalan (Inside little Ala Mhigo)