The Vietnamese sacked Angkor Wat in 1177, and the king then started a new capital city, Angkor Thom, a couple of miles north. I'm not sure why the entire area is always referred to as Angkor Wat rather than the proper town name of Siam Reap, because the large majority of photos are actually of Angkor Thom rather than Angkor Wat. And that pictorial preference is due to the fact that the king had his face built into the city walls, temples, guard towers, pretty much everywhere, which makes for some cool photos.