  It is not straightforward to determine the distribution of supernova remnants
(SNRs) in the Galaxy. The two main difficulties are that there are
observational selection effects that mean that catalogues of SNRs are
incomplete, and distances are not available for most remnants. Here I discuss
the selection effects that apply to the latest catalogue of Galactic SNRs. I
then compare the observed distribution of `bright' SNRs in Galactic longitude
with that expected from models in order to constrain the Galactic distribution
of SNRs.
