Template:Mines opened North Rhine-Westphalia Decade

Federal states of Germany:

[[:Category:Mines in North Rhine-Westphalia opened in the {{{3}}} century|Mines in North Rhine-Westphalia opened in the {{{3}}} century]]: ◀ · 0s · 10s · 20s · 30s · 40s · 50s · 60s · 70s · 80s · 90s · ▶