Thank you friends for all these compliments.
@ceciliabr
In fact there are 50% of mine (golden statues, curved roof, columns, friezes).
When I finalize a scenery, I share average quality for a quick overview.
If I see a problem in texture, I put the object in matt, I update texture and I raise a quick overview...
For the high ceiling, I took the principle of onion.
a first layer to the ceiling,
a second to the gilding,
a third for the tapestries.
Another night of hard work for the PC of course. [:))]
View of the ceiling with gilded friezes (1024x768 in Q4 with R1.3.1 high : min=2 & max=4)
Calculation time :
10h24mn
Next challenge, I think the royal chapel of the same castle...
If I find time.

real picture
Oh my god, not easy...