As previously mentioned on this website, even though John Thomas Smith references the Rule of Thirds in his book "Remarks on Rural Scenery," it should be noted that the Rule of Thirds grid is actually derived from the 14 line armature by driving two vertical and two horizontal lines at the 1⁄3 and 2⁄3 divisions. In the images below, notice how the Rule of Thirds grid won’t change regardless of the dimensions of the rectangle.
Examples of Artists Using the 14 Line Armature of the Rectangle
In the examples below, notice how master artists have employed the armature of the rectangle in their compositions. However, it’s important for the student to do their own research to try and discover alternate methods that the artist or photographer might have employed in their body of work.
Paintings above by Niccolo dell’Abbate and Diego Velázquez using the armature of the rectangle for their compositions
Painting above, "Martyrdom of Saint Andrew," by Jusepe de Ribera