On the Celebrated Serenity Prayer---of St. Francis?

The famous "serenity prayer" reads something like this: > God, grant me the serenity to accept the things I cannot change, the courage to change the things I can, and the wisdom to know the difference. Many Catholics seem to attribute the above to St. Francis of Assisi; however, it seems to me that the Protestant theologian Reinhold Niebuhr may have indeed authored it. See, for example, [*Original Serenity Prayer*](https://proactive12steps.com/serenity-prayer/) QUESTION: Can anyone provide any evidence that the "serenity prayer" was known by anyone prior to Reinhold Niebuhr (1892--1971)? Can anyone suggest why it seems to have been long attributed to St. Francis of Assisi? Is there any evidence that St. Francis ever uttered or wrote it? Thank you.