For more than four centuries successive khmer kings worked on the grand complex temples and palaces at this site, and each king built a temple mountain dedicated to her personal god

The answer is : Angkor Wat, Cambodia. For more than four centuries successive khmer kings worked on the grand complex temples and palaces at this site, and each king built a temple mountain dedicated to her personal god. Most temples that came before Angkor Wat were dedicated to the Hindu god Shiva, however, this temple was different. Suryavarman II dedicated his masterpiece to Vishnu and faced it west (the direction associated with Vishnu), instead of east.