Generalitat
At a corts celebrated at Barcelona, Vilafranca del Penedès and Cervera in 1358–1359, Peter instituted the Generalitat. Castile had recently invaded Aragon and Valencia and the cortes decided to streamline the government by designating a dozen deputies to oversee the fiscal and material policies of the Crown. The first "President of the Generalitat" was Berenguer de Cruïlles, Bishop of Girona (1359).
Toward the end of his reign (c. 1370) Peter ordered the compilation of the Chronicle of Sant Joan de la Penya to record the historical basis for the authority of the crown.
Read more about this topic: Peter IV Of Aragon