QP3D's Ruined Citadel Collection features some very nice pieces, made of good quality PLA and at better prices than most plastic gaming scenery.
All the sets in the Ruins collection match each other architecturally, allowing them to be combined to make an entire ruined citadel.
This particular one is probably my favourite of the Ruins, as it has a good-sized raised level area plus a place down below for creatures to lurk in behind the large arches. It's an impressive size on the tabletop, large enough for, say, a band of heroes to try to defend the upper level from a horde of some foul enemy or other attacking from ground level. The stairs between the levels have steps large enough for smaller figures to stand on.
Construction is very simple, consisting of two parts which cyanoacrylate bonds fine - some very minor cosmetic work may be required to hide the join along the top of the large arches once the parts are glued. Primer applies perfectly to the PLA (I use Vallejo surface primer) and any decent acrylics of choice can be used for painting. (I use Vallejo Game and Reaper Master Series).
The cute Half-Demon sisters in the first image are a 32mm and a 28mm figure respectively, to give some scale.
The second image shows assorted QP3D Ruin elements combined - this one is to the back with the red, winged Demoness standing on it.