vertical arrangement of six framed pieces of art hanging on a white wall

vertical arrangement of six framed pieces of art hanging on a white wall. The art is hung in what appears to be an indoor space, potentially a gallery or exhibit. The wall is mostly blank, with a few visible marks and imperfections. To the left is a white structure with circular and rectangular indentations. To the right of the wall, the edge of a floor with a mosaic pattern is visible. Each framed artwork has a small white label or card attached above the frame, suggesting the pieces are numbered or have information associated with them. It is impossible to determine the location in Sofia, Bulgaria based on the provided image.