the map location posted below is accurate.
to get there, make a south past the golems after the room with the pool in the middle.
go past the shopkeepers and what not and jump over the ledge.
move past the fountain and the hands, curve a little to the left and go as far north as you can up the hall.
the grandmasters are just to the left in a room with steep stairs, and there are more of them to the south. to get to those go up the stairs, into the hallway on the left (when facing south) there is a ramp on the left side of this hallway. it is tricky to see. there are more grandmasters in this area.
Edited, Feb 7th 2010 2:15am by starwhisp