At the instigation of Cardinal Ximenes that pledge was broken, and, after a residence of eight centuries, the Mohammedans were driven out of the land.
The coexistence of three religions in Andalusia--the Christian, the Mohammedan, the Mosaic--had given opportunity for the development of Averroism or philosophical Arabism.

This was a repetition of what had occurred at Rome, when the gods of all the conquered countries were confronted in that capital, and universal disbelief in them all ensued.
Averroes himself was accused of having been first a Mussulman, then a Christian, then a Jew, and finally a misbeliever.

It was affirmed that he was the author of the mysterious book "De Tribus Impostoribus." In the middle ages there were two celebrated heretical books, "The Everlasting Gospel," and the "De Tribus Impostoribus." The latter was variously imputed to Pope Gerbert, to Frederick II., and to Averroes.
In their unrelenting hatred the Dominicans fastened all the blasphemies current in those times on Averroes; they never tired of recalling the celebrated and outrageous one respecting the eucharist.

His writings had first been generally made known to Christian Europe by the translation of Michael Scot in the beginning of the thirteenth century, but long before his time the literature of the West, like that of Asia, was full of these ideas.

We have seen how broadly they were set forth by Erigena.
The Arabians, from their first cultivation of philosophy, had been infected by them; they were current in all the colleges of the three khalifates.