I've walled everything in on my house, no more NPC's all getting killed on Blood Moons. It's mostly pearlstone brick walls, with obsidian brick and copper brick walls as well. The... weird little things I made to fill empty space mostly
Walled house

Designs are a bit messed up, and the words say "courtyard", "outer", and "up."

don't mean anything, just random. I've also built my statue farm, in the top right.