squares there were lit with fountains and the home of birds that sang amid the branches of their aged trees , but of all these the greatest was that place where stood the king 's palace , and the tower thereof was the loftiest in the city , and the fountains that played before the doors shot twenty fathoms and seven in the air and fell in a singing rain of crystal : therein did the sun glitter splendidly by day , and the moon most magically shimmered by night .