n open green door in a building, likely a school or university in Panagyurishte, Bulgaria

n open green door in a building, likely a school or university in Panagyurishte, Bulgaria. A sign on the wall next to the door reads "КАБИНЕТ 20 МАТЕМАТИ" ("Cabinet 20 Mathematics" in Bulgarian), indicating the room is a mathematics classroom. An evacuation plan is posted on the wall. Inside the room, there is a whiteboard with writing and drawings. Outside the classroom a cushioned bench sits along the wall. The floor in the hallway is tiled in alternating grey and black squares. A bag is visible near the bench.