Osa

Osa stands on the left bank of the Kama near the mouth of the Tulva. Brothers Nechay and Filipp Kaluzhenin founded the Novonikolskaya sloboda on Bashkir lands at the end of the sixteenth century as an eastern outpost of the Russian state. The settlement later became a fortress. Records called it Osinskaya Nikolskaya in 1623 and simply Osinskaya in 1678; by 1732 it was known as the village of Osa. It received town status in 1739.