Very interesting -- thanks very much for the explanation about the limbus patrum.
I guess my partial knowledge puts me in a sort of limbo between Los Angelinians and the true cognoscenti! :-)
A search for "Descent to Limbo" finds 7 pictures in
www.wga.hu, and "Descent to Hell" additional 1, some fairly orthodox, others fully westernized, but all impeccably, and eclectically, Catholic. This, for example, shows Adam receiving a firm handshake while a crew of demons hides behind a rock.
Descent of Christ to Limbo
Andrea da Firenze
1365-68
Fresco
Cappella Spagnuolo, Santa Maria Novella, Florence