The Mahabodhi Mahavihara or more popularly known as the Bodhgaya Temple or the Great Stupa, is one of the shrines out of the 84000 shrines erected by King Asoka the Great in the 3rd century B.C. The Mahabodhi Mahavihara is the sole surviving example of what was once an architectural genre.
http://bodhgayatemple.com/index.php?pg=history