Although the judicial administration in Spain is erected on the basis of the professional judge, Spanish law also provides for a degree oflay participation through three institutions: the office ofJustice ofthe Peace, the right of"popular action," and what is basically the jury system, which will form the subject ofthis article. The jury system in Spain is stipulated in the Spanish Constitution and is currently regulated by the Organic Law of May 1995, but it is not the first time that trial by jury has existed in Spanish criminal proceedings. This article examines some historical precedents ofthe various Spanish jury systems as well as the constitutional and legal regulation of the present system. A number of elements of Spanish law and the jury system are subsequently analyzed, and concluding remarks are offered. The jury system puts a ban upon intelligence and honesty, and a premium upon ignorance, stupidity, andperjury. It is a shame that we must continue to use a worthless system because it was good a 1,000 years ago.