No significant religious opposition to usuary, how does banking and finance develop?

Let's say around the time of the Roman Empire's adoption of Christianity, that part of its formalization and the future development of the Catholic church did not push such a heavy anti-usury viewpoint. Let's also say that (if it develops given the POD) the Islamic faith has similarly reduced anti-usury views.

How do you think various financial and banking institutions and ideas will develop over time as the centuries progress? What will it look like in this TL's medieval and renaissance, and pre-industrial periods?
 
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