In Southeast Asia, the most widespread institutions are centered on wats, which refers to an establishment with various buildings such as an ordination hall, a library, monks' quarters and stupas. East Asian Buddhist institutions also use various structures including monastic halls, temples, lecture halls, bell towers and pagodas. In Japanese Buddhist temples, these different structures are usually grouped together in an area termed the garan. In Indo-Tibetan Buddhism, Buddhist institutions are generally housed in gompas. They include monastic quarters, stupas and prayer halls with Buddha images.