How high in the air would an object have to float to ensure that a medieval society cannot reach it, no matter how hard it tries

Let's assume some things:

• The ground under the object is flat land.
• The object always remains in the same position.
• The object is clearly visible from the ground.
• It is a high priority for the people to reach the object.

The method used can be anything, such as building a tower or just piling up a huge mound.

How high would you have to place this object to make it credible that people have never reached it in hundreds of years?

Bonus question: How high does it have to float to avoid being hit by flying objects thrown by trebuchets, ballistas or any machine specifically built for hitting the object?

posted about 5 years ago

Aureus‭

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