A frame within a frame

Like many other photographers I'm constantly looking for interesting geometrical figures when shooting. A frame, for me, is especially tempting because it kind of comments on a meta level on the photo it becomes a part of, i.e. on the way you frame the picture. In this case, I followed the two guys carrying the frame and first took a photo with both of them on it, but this one - due to its apparent "incompleteness" and because of the door frame in the background - is better in my opinion.

November 1997 in Rome, Leica and Tri-X as most of the time. By the way, as this is one of several photos that don't mention the focal length I should say that, beginning February 1996 when I bought it, I almost always used the 35mm Summicron on the M4-P, so it's very likely that this one as well as many others were taken with this focal length. However, I don't have any notes so there's always a tiny chance I used the 50mm lens instead. Definitely, all M4-P photos were taken with one of these two lenses, though, so they're always tagged with "Summicron".

Addendum: This photo was featured on LeicaShots on December 7.