Nifty & historic machinery in Postcrossing card from Germany

This postcard found its way to my southcentral Pennsylvania mailbox thanks to Postcrossing. It's from Tom, a fan of UNESCO World Heritage Sites, who writes:

"Hello Chris!
Nice to meet you here. ;-) My name is Tom. I'm 58 y.y. and this card is from my hometown. The coal-mine Zollverein in Essen is UNESCO WH and it's a very interesting location. Earlier industry and today culture!"

The Zollverein Coal Mine Industrial Complex, which dates to 1847 (a mere 684 years after the groundbreaking for Notre-Dame de Paris), is perhaps best known for Shaft 12, which is what's pictured on this postcard. According to Wikipedia, Shaft 12 was "built in the New Objectivity style, was opened in 1932 and is considered an architectural and technical masterpiece, earning it a reputation as the 'most beautiful coal mine in the world.'"

Zollverein is also one of the settings for the Pulitzer Prize-winning novel All the Light We Cannot See by Anthony Doerr, which is on my long, long, long list of books to read.