De or het wederoprichting?

The correct Dutch article is:

de wederoprichting

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

How to use wederoprichting

the wederoprichtingde wederoprichting
this wederoprichtingdeze wederoprichting
that wederoprichtingdie wederoprichting
our wederoprichtingonze wederoprichting
your wederoprichtingjouw wederoprichting
every wederoprichtingelke wederoprichting
which wederoprichting?welke wederoprichting?
a big wederoprichting / the big wederoprichtingeen grote wederoprichting, de grote wederoprichting