De or het visveiling?

The correct Dutch article is:

de visveiling

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

How to use visveiling

the visveilingde visveiling
this visveilingdeze visveiling
that visveilingdie visveiling
our visveilingonze visveiling
your visveilingjouw visveiling
every visveilingelke visveiling
which visveiling?welke visveiling?
a big visveiling / the big visveilingeen grote visveiling, de grote visveiling