De or het ringkade?

The correct Dutch article is:

de ringkade

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

How to use ringkade

the ringkadede ringkade
this ringkadedeze ringkade
that ringkadedie ringkade
our ringkadeonze ringkade
your ringkadejouw ringkade
every ringkadeelke ringkade
which ringkade?welke ringkade?
a big ringkade / the big ringkadeeen grote ringkade, de grote ringkade