The Znamensky Convent was founded in approximately 1673 but today it only has one church - the Ascension Cathedral. Most of the convent's walls, which date from the mid-19th century, also survive but houses are now located within the walls along with the cathedral.

Ascension Cathedral

The Ascension Cathedral is probably the most beautiful church in Ostashkov and it owes its Russian revival architectural style to the fact that the cathedral was substantially rebuilt in 1868 after a fire damaged the original building. In 1928 the cathedral was closed but subsequently reopened in 1947, becoming the only place of worship open in the city.