He has left us alone, but shafts of light sometimes grace the corner of our rooms (Svetitskhoveli Cathedral, Mtskheta)
God had more than just the one team of architechts working on Vietnam by the way; he had another bunch working on cathedrals in Georgia. They correctly predicted that with a rotunda high enough, with the smoke of candles, the sunlight coming through the window would appear as if it was God's own light streaming in, which was of course the effect the architect deliberately wanted to achieve.