De or het reisherinnering?

The correct Dutch article is:

de reisherinnering

Rule Words ending in -ing: almost always de. See the rule

How to use reisherinnering

the reisherinneringde reisherinnering
this reisherinneringdeze reisherinnering
that reisherinneringdie reisherinnering
our reisherinneringonze reisherinnering
your reisherinneringjouw reisherinnering
every reisherinneringelke reisherinnering
which reisherinnering?welke reisherinnering?
a big reisherinnering / the big reisherinneringeen grote reisherinnering, de grote reisherinnering