The Popangelovs’ House is the oldest surviving building in the town. It was built at the end of the 18th century – before 1798. The construction includes a stone first floor and a second living floor made of wooden timbers plastered with clay. The construction model was innovative in order to provide better thermal insulation, providing more comfort to the family during the cool and cold seasons. The Popangels’ house is typical of the architectural type of dwellings built before the Kardjali burning down of Tryavna at the end of the 18th century. Similar to other representatives of this type, it is situated with its back to the street facing a vast courtyard. In the difficult and uncertain times of Tryavna’s early development, such a layout ensured the family greater protection from foreign glances – even neighbourly ones. A silk-textile workshop (Cossack) was located in the stone ground floor. Access to the second floor was by an external open staircase. According to an old Balkan tradition, the house has a porch on both sides. The division of the living floor is simple – a main living room (houses) with a hearth located in the corner. The second room is also light – and with living functions (room). There is also a third storage room – without windows (closet).

The first owner of the house was Grandpa Kolcho. He came to Tryavna to learn the Cossack craft, here he got married. His son Dimitar Kolchev inherited his father’s craft. His grandson Angel Dimitrov Kolchev studied construction, and learned silk-textile under his father Dimitar. When he was older he became a priest in the village of Belitsa. He also gave the name of the house, known as the Popangelovs’ house (the house of Father Angel).