De or het relaiscentrum?

The correct Dutch article is:

het relaiscentrum

Rule Words ending in -um and -ium: usually het. See the rule

How to use relaiscentrum

the relaiscentrumhet relaiscentrum
this relaiscentrumdit relaiscentrum
that relaiscentrumdat relaiscentrum
our relaiscentrumons relaiscentrum
your relaiscentrumjouw relaiscentrum
every relaiscentrumelk relaiscentrum
which relaiscentrum?welk relaiscentrum?
a big relaiscentrum / the big relaiscentrumeen groot relaiscentrum, het grote relaiscentrum