Decor: Monuments, Wall Hanging, Displays, and Trinkets?

[ShivaSenpai]

I'm clearly missing something when it comes to monuments for outside the Lighthouse and wall hangings, displays, and trinkets for Rook's bedroom decor. I'm near the end of the game and I only have 14/35 monuments, 10/39 wall hangings, 15/59 displays, and 11/52 trinkets unlocked. I purchased all of the decor goodies from all/most of the faction vendors as well as some of the people in the "marketplace" areas of the factions. But I'm wondering if there might be some hidden vendors, chests, quests, etc.
Is there something in particular I should be looking for when exploring?

Note: I've already played the game twice, so spoilers are OK, just please use the spoiler formatting labels for others who haven't beat the game.

[PIT_DEFENDER]

I had no idea there is so many ;p

[ShivaSenpai]

Originally posted by PIT_DEFENDER:

I had no idea there is so many ;p

LOL right? Since I have less than half for all of them, I feel I'm not understanding where/how to find them. I know some are obtained through quests and some through vendors, but there's still a huge chunk missing.