  In this review I summarize the observational attempts done so far to unveil
the nature of the progenitor system/s of Type Ia Supernovae. In particular, I
focus on the most recent developments that followed the alleged detection of
circumstellar material around a few events, and on the link this possibly
establishes with recurrent novae. In this framework, I then discuss the case of
RS Oph, what we know of its circumstellar environment, and what this is telling
us about its supposed connection to Type Ia supernova explosions.
