What do Alexander the Great and Winnie the Pooh have in common?

I'm black as night, but bring the light. I'm deep in the earth, a hidden might. Men dig for me, for power and heat, but break their backs in this dark retreat. What am I?

I am black from head to toe. In Norse mythology, I am both memory and thought. Sometimes I’m an omen, in others good luck.

I leave my mark on stone and steel, on every wound that’s learned to heal. Though none can stop or turn me back, I quietly remain on an ever moving track.

I'm a place where you view through the lens of the past. History lovers tend to have a blast. Where art lovers can nurture their inner critic, As they stand before each old painting and relic.