Sudislavl
Sudislavl grew up east of Kostroma around a timber kremlin. Its earliest surviving documentary mention occurs in the testament of Ivan IV in 1572, though a later chronicle of the local Resurrection monastery claimed that the town existed in 1360. In the seventeenth and eighteenth centuries it was known as a merchant town. Local merchants paid for several stone churches, and Old Believers became the dominant religious community in the surrounding district.