This castle resulted from the constraints that we have with printing volume and time. I wanted something that looked realistic, could be populated on each floor with furniture and people at 1:72 scale, yet that could still be printed on a 223x223mm printing plate.
These constraints may be similar to what the owner of an impoverished hilltop in South Germany, Bohemia or Austria would also have faced: limited space, limited construction timeframe and limited budget.
My other must-haves included a tile roof, a clockwise spiral staircase for mobility between floors, a fireplace on each floor, and sanitary facilities (there are two privies on level 3 with a wonderful view). Also, there had to be a watchtower with interior wood stairs between levels to observe and track approaching merchants, boatmen or other potential victims of banditry and extortion.
The walls, tower bases and the gate are interchangable with my previous post for a Roman-style frontier wall (in the file here the crenellations are smaller) and dimensions of all elements here are the same, so you can use any of the wall and gate files there to further customize your castle.
Note that the keep has three levels, there are main hall and spiral staircase roofs, and a rooftop floor. A drawbridge is still missing, but could be easily added.
A complete version of the minimum-size castle that can be printed using these files is shown here in 1:144 scale, printed out at 50% size with PLA on an Ultimaker 2+ using a 6mm nozzle (note this was a test – more details appear when using a 4mm nozzle). The diorama in the picture includes a moat (not part of the model!).
As another test, I have added here also a 1:288 scale printout (25% size) of the entire castle, printed using a 0.4mm nozzle next to the 1:144 scale one. It still looks nice and not much detail has been lost.
This castle would also look nice in a model railroad display at 83% size (= 1:87 HO scale).
A picture also shows the main keep as well as the Watchtower with some of the walls in the much larger/majestic 1:72 scale (100% size), with some appropriate figures added. The third level is a version that had more windows, which was more a fantasy castle. This version is more grimly realistic. Enjoy !