First attempt on this

Used image from https://www.deviantart.com/aitorperez/art/Age-of-empires-Tower-502129301

I then passed the image on Trellis3D to convert to a full 3D model. Downloaded the .obj file and transformed that file into.stl using Meshy.

A lot of detail is lost in this process.

Added the 3MF format File as well.