Draw a large rectangle for the main castle body
Add two or more tall towers on the corners
Draw narrow rectangles on top of each tower for the upper sections
Add battlements along the top edges of the walls and towers
Draw a large arched gate in the center
Add a smaller door or portcullis inside the gate
Draw windows on the towers and walls
Add a drawbridge in front of the gate if desired
Sketch stone lines across the walls to show bricks
Add roof shapes to the towers, such as cones or pointed tops
Draw flags on the highest towers
Add a surrounding wall or courtyard if desired
Include details like cracks, stones, and texture
Outline the final drawing with darker lines
Erase unnecessary sketch lines
Color the castle with gray, brown, or beige tones