De or het memorium?

The correct Dutch article is:

het memorium

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

This word is not in the word lists we use to double-check answers.

How to use memorium

the memoriumhet memorium
this memoriumdit memorium
that memoriumdat memorium
our memoriumons memorium
your memoriumjouw memorium
every memoriumelk memorium
which memorium?welk memorium?
a big memorium / the big memoriumeen groot memorium, het grote memorium