IMPORTANT: The Sketchfab render only contains one of the 26 mines, so you can get a feel for it. This is because the file containing all 26 is excessively large and caused problems with the upload. The schematic contains all 26, as shown in the picture.
This package has 26 mine variants, for each letter of the alphabet. They are great for use in a prison server. The common theme is medieval/fantasy. The schematic contains all 26 laid out. In each building, a door marked with its letter leads into a courtyard with a central mine. The mine has four ladders that allow for ease of access. Each mine has a 20x40 opening, and a depth of 19, yielding a total space of 15200 blocks.