Labrang Monastery is a very special one out of the mix. First, it was founded by the first Ngawang Tsondru, Tibetans most important monastery town outside the Tibetan Autonomous Region. Secondly, Labrang Monastery strategically located between 4 major Asian cultures: Mongolian, Chinese (Han), Chinese (Muslim) and of course, Tibetan. It was a major hub for religious festivals back in the 20th century and was rumored to have had many thousand monks residing there.
Of course, in todays world, the monastery still stands but it is a fraction of what it used to be. Still though, many people come to visit Sera Monastery and as you can see in the picture below, it is frequented by many Tibetan monks.