I've been told Lhasa, Tibet is the "home of Tibetan Buddhism". It is where Potala Palace is, which is where the Dalai Lamas lived for a few hundred years until he was ousted in 1959. Wikipedia lists Potala Palace as a museum now. Back in 2002, when I visited Tibet, Jokhang Temple was still in use as a Buddhist temple. We were lucky the day we visited because there was some kind of celebration in the courtyard with a blessed cake and Coca Cola.
Buddhist Monks at Jokhang Temple courtyard
You don't need to know about Buddhism or the history of Tibet to appreciate the architectural details, hundreds of years old in some cases, and the great view you get from the rooftop. You can see Barkhor Street, the main business area in the "old town" part of Lhasa, and Potala Palace sitting up on a hill just outside of the downtown area.
Jokhang Temple Doorway
Jokhang Temple Bell
Protip: If you go to Tibet, you WILL get high! When I got off the plane I was very lightheaded and even had some altitude sickness after dinner. There were a couple ladies who just sat down and didn't walk after getting off the plane. It is a huge change of atmosphere going from the pressurized cabin to the "Top of the World".
Barkhor Street and Potala Palace in Lhasa Tibet
Many Tibetan Buddhist make a pilgrimage to this temple. Some of them even prostrating on the ground the whole way there. Throughout the day, the faithful are always circling the building in the same direction. Barkhor Street is a great place to do some People Watching. It is hard to describe, but I wish that you could smell the photo below. There was always some type of sage being burned outside and it combined with the yak butter oil candles to something very unique.
Barkhor Street in Lhasa Tibet
There are some more photos and a little descriptive text about my trip to Jokhang Temple on my website. If you can't be bothered to click through the photos, there is a Jokhang Temple Slideshow on Youtube, but it has less photos.