Oltu
Oltu occupies an upland setting in the northeastern Anatolian and southern Caucasian borderlands. Valleys and mountain passages connected cultivated land, pasture, fortified places, and routes leading toward Georgia and the Armenian highlands. Rural households combined farming with livestock keeping according to elevation and available water. Churches, monasteries, local nobles, and fortified settlements formed part of a landscape in which religious traditions and political allegiances could overlap across neighboring communities.
Oltu's castle preserves evidence of a long history on this contested frontier. The Ottomans took the town from Georgian rulers in the sixteenth century. Under Ottoman rule Arslan Pasha built a mosque here in 1665, while older Christian remains survived at the castle. In 1829 Russian forces occupied the area briefly before it returned to Ottoman control under the peace settlement.