De or het festivalpodium?

The correct Dutch article is:

het festivalpodium

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

How to use festivalpodium

the festivalpodiumhet festivalpodium
this festivalpodiumdit festivalpodium
that festivalpodiumdat festivalpodium
our festivalpodiumons festivalpodium
your festivalpodiumjouw festivalpodium
every festivalpodiumelk festivalpodium
which festivalpodium?welk festivalpodium?
a big festivalpodium / the big festivalpodiumeen groot festivalpodium, het grote festivalpodium