Collect Light Seeds from the place of the battle and enter the annex.
Slide down on a ramp collecting other Light Seeds.
Make sure that after the slide you have at least 11 Light Seeds.
Then jump onto the annex and go right.
Soon you should get to the door leading to the Palace Rooms.
20 and others - on the way to Coronation Hall.
Light Seeds starting with number 31 can be found on the way to the Spire of Dreams.
37 and 38 are situated in the place where the corridors meet and which is protected by one of Ahriman's servants.
Use red ring to reach to the remaining Light Seeds. It is situated on the left, just after leaving the central part of the location(going towards the Spire of Dreams).