Viharas were for the purpose of living, Chaityas were assemblies for the purpose of discussions. Further, Chaityas were with Stupas, Viharas did not have stupas.
The Hemis festival is dedicated to Lord Padmasambhava (Gur Rimpoche) venerated as the representative reincarnate of Buddha. He is believed to have been born on the 10th day of the fifth month of the Monkey year as predicted by the Shakia Muni Buddha
EXAMIANS