In the context of this artwork, explain the The Founding of Constantinople of the Rubens' designs.

sketch: private collection, 6.3" x 16" (16.002 x 40.64 cm.)tapestry: 15' 10.5" x 15' 9" (483.87 x 480.06 cm.)The building of Constantinople occurred 324-330. The eagle flying overhead with a branch of broom depicts the legend of how the emperor chose the site for his city. It was taken as a good omen since broom was used to mark the enclosure of the city. In the sketch, the workman's displayed paper is blank, but the tapestry sketches in the ground plan of the Pantheon.
tapestry Pantheon Constantinople