A correspondent, Rene Fassaert, has directed my attention to a 1910 two-volume item Monuments Antiques, which contains some architectural materials for ancient Greece and Rome. It’s online in very high resolution at the University of Texas here.
On p.172 of the second volume (p.77 of the PDF), there is a splendid plan of the massive temple on the Quirinal Hill in Rome. This very clearly relates the great stairwell down the hill to the existing layout of the Colonna gardens.
The plate also contains a reconstruction of the whole plan of the temple. For some reason the original had this upside down, so I have corrected it.
Here it is. As ever, click on it for a larger image.
Much of the area of gardens to the left of the plan is now part of the Gregorian University. But the plan is still useful as a guide to what might be where.
UPDATE: I have had to reduce the size of the image, as the downloads were too much for my site bandwidth. You can of course follow the link to get the full size original.
- Monuments antiques : relevés et restaurés par les architectes pensionnaires de l’Académie de France à Rome; / notices archéologiques par Georges Seure, 2 vols, 1910.↩