Based on consilia and decisiones, Wouter Druwé studies the multinormative framework on loans and credit in the Golden Ages of Antwerp and Amsterdam (c. 1500-1680). He analyzes the use of a wide variety of legal financial techniques in the Low Countries, such as money lending and the taking of interest, the constitution of annuities, cession and delegation, bearer bonds, bills of exchange, partnerships, and representation in financial affairs, as well as the consequences of monetary fluctuations. Special attention is paid to how the transregional European system of learned Roman and canon law ( ius commune ) was applied in daily ‘learned legal practice’. The study also deals with the prohibition against usury and with the impact of moral theology on legal debates.