Justinian — Codex 4.32, De usuris

The strongest single piece of counter-evidence in the collection. The most self-consciously Christian legislator of antiquity capped interest rates and never prohibited interest — two centuries after Nicaea forbade it to his clergy.

We have also thought it necessary to enact a general law concerning the amount of interest so as to give relief from its harsh and heavy burden and make it moderate. We, therefore, order that persons of illustrious or higher rank shall not be permitted to stipulate for more than four per cent…; managers of shops… eight per cent; on maritime contracts… twelve per cent…; all other persons… six per cent.

C. 4.32.27 (529) adds that accumulated interest may not exceed the principal. Nov. 135.4 sets bankers at eight per cent; Nov. 32–34 set agricultural loans near four; Nov. 121 and 138 confirm the principal cap.

Comment

Every provision is a ceiling, and a ceiling licenses everything beneath it. Justinian does not restrain usury as a wrong; he prices it. The graduated schedule — four per cent for senators, six for ordinary persons, eight for bankers, twelve on maritime risk — is the work of a legislator treating interest as a legitimate instrument to be kept within bounds, not as a sin to be suppressed. The stated aim is relief from a “harsh and heavy burden,” which is the language of moderation, not prohibition.

This is the counter-evidence, and it is decisive for the address question. Two centuries earlier, [[nicaea-canon-17]] had forbidden the clergy to take interest. Basil, Gregory, and Chrysostom had denounced the practice from the pulpit in the strongest terms available to them. The emperor who codified Roman law as a Christian act, who closed the Academy and built the Hagia Sophia, legislated interest rates and left interest lawful for every subject of the empire.

If patristic teaching on usury had carried a claim on the magistrate, this is where it would show. It does not show.

The pattern, stated plainly. The fathers preached against a practice the law permitted, and did not ask the law to change; the councils bound their own ministers; the Christian emperors regulated the rate. The first ruler to prohibit usury to everyone, lay and cleric alike, is Charlemagne in 789 — roughly four centuries after Basil, and by way of Nicaea and Leo rather than by way of Exodus. Whether the Carolingian prohibition reasons from Mosaic law at all could not be established and remains an open question for this collection.