This drawing has a horizon line located at the middle of the paper. Note how little of the middle balcony's floor you can see. This is because it is very close to the horizon line. The closer an object is to the horizon line the more parallel it becomes to the horizon line. You can't see the floor of the upper balcony because it is above the horizon line. Another thing to note with this drawing is its design and how the "Eye" moves throughout the space. The "Eye" is led around the composition by the repetition of elements. For instance, look at the placement of the archways. The "Eye" is led in a "zig-zag" pattern. The repetition of circles and squares works in a similar fashion. This is what I mean by Direction and Movement or Rhythm and Movement.