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During the Second Bulgarian Empire the first castle of Asen dynasty was built on the hill. In the next years on the hill were populated with Boyars and orthodox clerics. The Monastery of St Ivan Rilski (John of Rila) was located in this fortress. The relics of the Saint were kept there to 1495.
Since the 1970s the Bulgarian government make plans for the restoration of the historical hill. In 2009 were restored the south watchtower.