 Some examples are the Toledo School of Translators from the 11th century.Jews and moriscos were allowed to hold high offices in the administration (See Abrahám Seneor, Samuel Abolafia, Yusé Abrabanel, López de Conchillos, Miguel Pérez de Almazán, Jaco Aben Nunnes and Fernando del Pulgar).A tightening of the laws to protect the right of Jews to collect loans during the Medieval Crisis was one of the causes of the revolt against Peter the Cruel and catalyst of the anti-semitic episodes of 1490 in Castile, a kingdom that had shown no significant antisemitic backlash to the black death and drought crisis of the early 14th century.