between the Middle Ages and the Renaissance. It is precisely in the 1490s when the first editions of Comedy of Calisto and Melibea began to appear. The unification of all the territories of the Iberian peninsula, except Portugal and the Kingdom of Navarre, under one king and one religion, Catholic Christianity, took place in this period. Claudio Sánchez Albornoz highlighted the importance of being Christian in a society that has warned against members of other religions, such as Jews and Muslims, and even came to outright rejection. Society was suspicious of converts, such as Christians who had been Jews before or had Jewish ancestry, and those who had to hide their conditions. Finally, those of other religions were expelled from the kingdom and the Inquisition would enforce orthodoxy among those who professed the Catholic faith. Editions There are two versions of the play. One is called a Comedy and has 16 acts; the other is considered a Tragic Comedy and has 21 acts. Although most scholars admit that an earlier version by an unknown author already existed, the first known edition is credited to be the Comedy published in Burgos by printer Fadrique de Basilea in 1499. The first page is missing and consequently there is no indication of title or author. It is preserved in the Hispanic Society of New York City. On the first page of the 1500 edition of Toledo, which is for the first time entitled Comedia de Calisto y Melibea it states: nuevamente revista y enmendada con la adición de los argumentos de cada un auto en principio ("newly reviewed and amended with the addition of the synopses of each act at its beginning"), alluding to a princeps edition prior to 1499. Some scholars wish to explain this discrepancy about the 1499 date, considering the version published in 1500 in Toledo to be the first edition; however, there is no positive proof of this, and there are some contradictions: 1. Acrostic verses are not in themselves proof enough that the 16th century edition is the "Prínceps Edition". 2. If the 1499 version was published after the Toledo version, it should contain as stated, additional material, whereas some of the verses are actually omitted. 3. The phrase "fernando de royas acabo la comedia" means that a previous version existed and that Fernando de Rojas completed it by adding additional material. The Toledo 1500 edition contains 16