Why are we allowed to have statues in our Churches?

I am trying to justify why we are allowed to have statues in our churches. Prostetant friends say it is worshipping idols. i kno wthat is not true but need the correct response.

Also the question of how man can name a sait like the Pope. i know one or two miracles have to be proven but pleas eexpound.
Bless!

The following links should help answer your questions. If you have any further questions, please contact Catholic Answers directly.
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Recommended Reading:**

What is an example of idolatry?

Carving statues and Images
Where are statues and saints in the Bible?
Where does the New Testament allow for graven images?
Do Catholics Worship Statues?

Beatification and Canonization
Where does a cause for canonization originate?

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