Such then was the condition of the peninsula preceding 918. It was divided into three kingdoms, each with its own ruler. Buddhism, a religion which began in India, came to Korea by way of China. It naturally first reached the northern kingdom. It was introduced in 369 A.D. and its introduction was the result of foreign missionary effort. In those days there was an Empire of China, but there were also various small Chinese kingdoms along the northern border of the Korean peninsula. Buddhism came to Koguryu from one of these little Chinese kingdoms, the king of which sent its message by the hands of a priest named Sundo, who brought idols and sacred texts. He was well received on his appearance in P’yeng-Yang. The king of the country placed the crown prince in his care for education. In a few years the new religion had made great headway. It had brought with it art and education, and the kingdom of Koguryu became a center of culture and advancement. [Illustration: PLATE III General view: Yuchom-sa, Diamond Mountains [Page 35]] Five years later, in 374, another priest named Ado was sent from the same Chinese kingdom. His coming added impetus to the religion and two great monasteries were founded near P’yeng-Yang, over one of which Ado was placed, while Sundo had charge of the other. These two monasteries were not only centers of religion, they were full-fledged universities according to the ideas of the universities in those days. After they were founded Buddhism continued to spread rapidly so that in 392 it became the official religion of the kingdom.