During the whole of the Middle Ages the work and experience of the Spirit did not play a great role either in mysticism or in systematic theology. No separate theological treatise, De Spiritu Sancto, was made, rather certain pneumatological topics were dealt within various contexts. Outside speculative theology, which on the whole translated the tradition, certain pneumatological accents can be found in a setting that was critically disposed towards the official Church and in some reformers of Church reality (the case of Joachim da Fiore, 1135-1202). But it should be said that the medieval period was a period rich in spiritual movements and fruits in the Christian West as well. It is in this period that the best prayers and hymns to the Hol...