Antiquity furniture is supposed to be buyable from the respective zone's achievement furnishing npc once you have completed 3/3 on that item's antiquity codex. I just wanted to point out that several antiquity furnishings are missing buyable gold options from the merchant Gathareth. For example, "Ayleid Arch, Wide" is purchasable for 15,000 gold from the achievement vendor upon finding the lead for it 3 times from treasure map chests. The following items appear to be glitched/not purchasable even though they should be upon completion of their antiquity codex: "Fresco, Colovian Lady", "Colovian Tapestry, Pastoral Farm", "Colovian Tapesty, Fancy Gate", "Colovian Tapestry, Worn". All of these come from treasure map chests including the Ayleid Arch Wide, I don't get why the arch is buyable but everything else is not? So I'm assuming this is a glitch/error?
I'm also including an image to show that I found the tapestry 3 times and it still doesn't show up for purchase in the vendor.
For whatever reason the Stone Relief, Yokudan shows up even though this is the wrong zone for that item: