This is a monochrome illustration depicting an interior scene within a building in Pernik, Bulgaria

This is a monochrome illustration depicting an interior scene within a building in Pernik, Bulgaria. The perspective shows a room divided into three vertical segments, under a grid-patterned ceiling. On the left, a brick-patterned wall extends upwards from a similarly textured floor. A human figure, viewed from behind, stands on a multi-rung ladder placed against this wall. The figure, dressed in a long skirt, has their right arm extended upwards, seemingly interacting with an overhead surface. The central section features a large, rectangular window or set of panels. Through the left panel, a bare, multi-branched tree is visible. Through the right panel, a textured landscape resembling rolling formations is depicted. Below the window, a ledge supports a line of small potted plants. In the mid-ground, a slender human figure stands facing the viewer with outstretched arms and open palms. This figure wears a short-sleeved top and a skirt. The floor in this area is dark and textured, with four scattered, light-colored, rectangular objects resembling papers. The right section of the room has a smooth, light-colored wall. A large, dark, semi-circular object with internal concentric markings is affixed to the upper portion of this wall and ceiling. Multiple curved lines or tubes extend downwards from this object. A smaller, nude human-like figure is depicted clinging to the lower right wall, reaching towards these lines or tubes. The floor in this section is also dark and textured, slanting downwards to the right.