Given the financial difficulties of the Spanish Crown in the 17th century, a willing ear was turned to proposals for combining Italian type Monti di Pietà with Crown chartered erarios, to finance both the Crown and private borrowers: nefarious usury was avoided by granting loans under the guise of a mortgage or lien. The Cortes of Castille favoured the project, but later scuppered it to stop the Count Duke of Olivares from using it as a taxing device.
The study makes it clear that the Cortes kept their powers of resistance for a century after the rout of the Comuneros at Villalar hence the abundance of projects addressed to the Cortes and a lively and sensitive public opinion, beside those addressed to die King and his ministers. The analysis of loans granted under mortgages and liens helps map the slow progress of die spirit of capitalism in baroque Spain.