Thanks, Sailor and roentarre! Just the first shot is here for display really, the second one is just a comparison for the curious. I think they are from around the same period, but it gets difficult to be certain because the castles were renovated all the time (until they were ultimately ruined by the English). Obviously, the first one uses a round design and the second one a rectangular. Otherwise, the hole in the ceiling and the actual boxes for the doves are similar. No wonder that you haven't heard of the world, Sailor, as eating doves as fallen out of favour
Although my Egyptian friend tells me it's common over there.