Ustrem Monastery "Holy Trinity"
Ustrem Monastery "Holy Trinity" is located to the southeast of Topolovgrad and 8km away from the town on the territory of Ustrem village. It is located at the foot of a steep hill and a small river called the "Manastirska" runs near it. At the end of the 18th and the beginning of the 19th century, the monastery housed many local rulers such as Hristo voivode, Indzhe voivode, Kara Kolyo, Daal Stoyan, Garabchi Georgi, Kara Dobri, Angel voivode and others.
