Ostashkov is a
town and the
administrative center of
Ostashkovsky District in
Tver Oblast,
Russia, located on a peninsula at the southern shore of
Lake Seliger, west of
Tver, the administrative center of the
oblast. Population:
History
The island of Klichen was first mentioned in a letter sent by Grand Duke
Algirdas of
Lithuania to the
Ecumenical Patriarch of Constantinople in 1371. After the island was pillaged by
Novgorod pirates several years later, two of Klichen's surviving inhabitants, Ostashko and Timofey, moved to the mainland, where they founded the villages Ostashkovo and Timofeyevo, respectively. The former belonged to the
Moscow Patriarchs, and the latter—to the
Joseph-Volokolamsk Monastery. In 1770, both villages were merged into the town of Ostashkov.