a) Chaitya: a Buddhist shrine or prayer hall with a Stupa at one end. In modern texts on Indian architecture, the term chaityagriha is often used to denote an assembly or prayer hall that houses a Stupa. Ex: Karle caves
b) Vihar: The Viharas or monasteries were excavated near the chaityas for the residence of monks in the rainy season.
C) stupa: It is a large round structure erected over some relics of the Buddha. Most famous of these stupas are Amravati and Nagarjunakonda.