Besides these chaityas, or temples, there are still more numerous _viharas_, or monasteries, found in India, of different dates, but none older than the third century before Christ. They show a central hall, surrounded on three sides by cells for the monks. On the fourth side is an open verandah; facing this is generally a shrine with an image of Buddha. These edifices are not imposing unless surrounded by galleries, as some were, supported by highly decorated pillars. The halls are constructed in several stories with heavy masonry, in the shape of pyramids adorned with the figures of men and animals. One of these halls in southern India had fifteen hundred cells. The most celebrated was the Nalanda monastery, founded in the first century by Nagarjuna, which accommodated ten thousand priests, and was enclosed by a wall measuring sixteen hundred feet by four hundred. It was to Central India what Mount Casino was to Italy, and Cluny was to France, in the Middle Ages,--the seat of learning and art. It was not until the Mohammedan conquest in India that architecture received a new impulse from the Saracenic influence. Then arose the mosques, minarets, and palaces which are a wonder for their magnificence, and in which are seen the influence of Greek art as well as that of India. There is an Oriental splendor in these palaces and mosques which has called out the admiration of critics, although it is different from those types of beauty which we are accustomed to praise. But these later edifices were erected in the Middle Ages, coeval with the cathedrals of Europe, and therefore do not properly come under the head of ancient art, in which the ancient Hindus, whether of Aryan or Turanian descent, did not particularly excel. It was in matters of religion and philosophy that the Hindus felt most interest, even as the ancient Jews thought more of theology than of art and science.