This full parametric classic roman column design allows you to design Corinthian, Ionic and Doric columns, with flat, square, concave or convex profiles of any amount and size in a round or square column setup. The materials that can be applied are on-site or precast concrete, limestone, marble, wood and glass which also can be painted as regular paint, drywall structure, marble or wood structure. All textures are procedural and can be customized freely by the user. Sizes on the column can be set manually or with gizmo's. Even the profiles can be changed in many ways, including a function to twist the profiles around the round columns. The number of drums can also be set.

I produced 3 tutorials that explain the Geometry Node Setup:
https://youtu.be/hEh3pLObkCE

The 2D Production Sheet:
https://youtu.be/wzer61opzFQ?si=70Qr171lJw_2JDDR

And the parameter menu and Gizmo functions.
https://youtu.be/WxN-4-WRSJM?si=vax-IminD3QA3XYw