Mi-son[340] is an undulating amphitheatre among mountains and contains eight or nine groups of temples, founded at different times. The earliest structures, erected by Bhadravarman I about 400, have disappeared[341] and were probably of wood, since we hear that they were burnt (apparently by an accident) in 575 A.D. New temples were constructed by Śambhuvarman about twenty-five years later and were dedicated to Śambhu-bhadreśvara, in which title the names of the founder, restorer and the deity are combined. These buildings, of which portions remain, represent the oldest and best period of Cham art. Another style begins under Vikrântavarman I between 657 and 679 A.D. This reign marks a period of decadence and though several buildings were erected at Mi-son during the eighth and ninth centuries, the locality was comparatively neglected[342] until the reign of Harivarman III (1074-1080). The temples had been ravaged by the Annamites but this king, being a successful warrior, was able to restore them and dedicated to them the booty which he had captured. Though his reign marks a period of temporary prosperity in the annals of Champa, the style which he inaugurated in architecture has little originality. It reverts to the ancient forms but shows conscious archaism rather than fresh vigour. The position of Mi-son, however, did not decline and about 1155 Jaya Harivarman I repaired the buildings, dedicated the booty taken in battle and erected a new temple in fulfilment of a vow. But after this period the princes of Champa had no authority in the district of Mi-son, and the Annamites, who seem to have disliked the religion of the Chams, plundered the temples. Po-nagar[343] is near the port of Nha-trang and overlooks the sea. Being smaller that Mi-son it has more unity but still shows little attempt to combine in one architectural whole the buildings of which it is composed. An inscription[344] states with curious precision that the shrine was first erected in the year 5911 of the Dvâpara age and this fantastic chronology shows that in our tenth century it was regarded as ancient. As at Mi-son, the original buildings were probably of wood for in 774 they were sacked and burnt by pirates who carried off the image[345]. Shortly afterwards they were rebuilt in brick by King Satyavarman and the existing southern tower probably dates from his reign, but the great central tower was built by Harivarman I (817 A.D.) and the other edifices are later. Po Nagar or Yang Po Nagar means the Lady or Goddess of the city. She was commonly called Bhagavatî in Sanskrit[346] and appears to have been the chief object of worship at Nha-trang, although Śiva was associated with her under the name of Bhagavatîśvara. In 1050 an ardhanarî image representing Śiva and Bhagavatî combined in one figure was presented to the temple by King Parameśvara and a dedicatory inscription describes this double deity as the cosmic principle.