By 1621 there must have been little left of the Baths of Constantine, but there was a market for a drawing, as the existence of this item by Lauro Giacomo shows. Here’s a small image from Europeana:
A proper-sized image can be found at the Savannah College of Art and Design, here. This allows us to read the text, which is, however, of no real interest. But the title is more useful – “Thermae Constantini Imperatoris (Ad Templum S. Silvestri in Monte Quirinali)”. The baths are described as near the church of S. Silvestro on the Quirinal Hill.
By coincidence I managed to find that church on Google Maps, and so I updated yesterday’s post about the Bufalini Map. It’s good to see that this correction appears to be in line with this 1621 image.