This image depicts an empty classroom in Veliko Tarnovo, Bulgaria

This image depicts an empty classroom in Veliko Tarnovo, Bulgaria. The scene is dominated by light-colored walls: the upper section is an off-white or cream color, while the lower section is a light green or beige. The floor is covered with light brown wooden parquet flooring arranged in a herringbone pattern. On the left side of the frame, a large white whiteboard is mounted on the wall, filled with handwritten mathematical equations, numerical calculations, and text, primarily in Cyrillic script. A red marker is visible at the bottom right corner of the whiteboard tray. To the right of the whiteboard, a black flat-screen television is wall-mounted, displaying a presentation slide. The slide's title, visible at the top, is "Линейни диофантови уравнения с две неизвестни" (Linear Diophantine equations with two unknowns), indicating a mathematics subject. The slide content, also in Cyrillic, presents a theorem and its proof. A black electrical outlet is located on the wall beneath the television, with a black power cable extending from the TV to the outlet. No individuals or active interactions are present in the image. The environment appears to be an educational setting.