Identify Masonic Symbol?

Question

I have found this symbol in S.Maria del Popolo Church in Rome.

http://img155.imageshack.us/img155/5921/img1394at5.jpg

As you can see is not the "classical" masonry symbol, with the opened compass; there are a brush on the left, a closed compass on the right, and something that resembles a bone, horizontally, placed below. The circle on the background is an Ouroboros, but it could be there only to mark some alchemy activism by the lodge, to say it in other words, it could not be part of the lodge symbol.

Can you tell me what lodge is it? Remember this is a roman church, it may help.

Thank you.

Answer 1

Not a clue. It could represent the arts and sciences.

Answer 2

! I thought all traces of that had vanished! It's not strictly Mason, not by a long shot. I can't actually remember the name of the group, but i know full well i have seen that before.  

Answer 3

The Ouroboros has never been a part of regular Masonic symbolism. That aside you are looking at a symbol of the Trinity contained within eternity. The elements which make up the triangle are standard tools used in Freemasonry to illustrate various principles and are expounded upon by Albert Pike in "Morals and Dogma".

Answer 4

if this is on a Roman (Catholic?) Church you have your answer there --- its not a masonic symbol, why not ask the Priest/Bishop what it stands for.

trying to apply a masonic interpretation to it would be fruitless.