Porter made several views of the tower at Birs Nimrood from all angles, and gave a lengthy description in his Travels. He thought that it was the remains of the Temple of Belus (or Baal), the ziggurat reputedly built by the Babylonian King Nebuchadnezzar on the site of the Tower of Babel in the 6th century BCE. Porter’s observation was partly based on the burnt nature of the bricks used to construct the tower, which he conflated with the baked bricks described in the Book of Genesis.
This view of the west face of the tower gives a good impression of the abruptness of the mound, which sits on a plain to the southwest of Hillah, east of the Euphrates, in present-day Iraq’s Babylon Province. This is now known as the site of the ancient city of Borsippa. Porter emphasises the silhouette by outlining the hill in ink.