I love stuff like this. In Colorado something is called Historic if it's a hundred years old, basically back to the old west. In the American South West you'll occasionally get 500 year.old Spanish Missions or 700 Anasazi Indian Pueblos but really everything here is only a few generations old. I've been to the east coast and depending on where you go that norm is pushed back, anywhere from 200 to four hundred years but still... That's old but not really *that* old. 

Went to England a few years ago and I had a blast. First thing I did was go see Westminster Abbey and was just enthralled by this enormous, gorgeous building that was 11 times older than any considered "historic" back home. 

While in London I visited a pub called the Ye Olde Cheshire Cheese off Fleet Street. I ducked into a small alley and walked into maybe a hundred feet and was greeted by a small black sign that said "Rebuilt 1666". I came to learn that the pub had originated as an Abbey where are was brewed for the monks. In the 14th century it had been converted to a Public House and had burned down in the Great Fire of London in 1666. It was surreal. It was so old that it advertised that date as casually as a bar back home would being under new management