Step one:
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First draw a bar-shaped base with two arcs.
Step 2:
Draw a rectangle on top.
Step Three:
Draw two curved arcs upward to connect them.
Step 4:
Draw a smaller rectangle on top.
Step 5:
Then draw arcs inside the curved rectangle to divide the floors.
Step 6:
Then draw the arch decoration below, and draw long short lines on the middle floor.
Step 7:
After the building is drawn, draw an arc at the back and add triangular trees to connect it.
Step 8:
Finally, paint it with a nice color, and the Leaning Tower of Pisa is complete.