Large chambers - spacious upper chambers.
It is cieled - Or, roofing it.
Vermilion - The pigment which gives the deep red color still bright and untarnished on many ancient buildings.
Related Commentaries of Jeremiah 22:14
Jeremiah 22:14
14 That saith, I will build me a wide house and largea chambers, and cutteth him out windows; and it is cieled with cedar, and painted with vermilion.