How much authority does Pseudo-Dionysus still have in today's Catholic Church? Ancient and medieval Church identified the sixth century Syrian Christian Neoplatonist author Dionysius the Areopagite, and not until modern times the truth has been revealed. However, Pseudo-Dionysus was seen as an authority figure among medieval theologians like Saint Thomas Aquinas. Therfore he has tremendous impacts in the development of Christian theology. But how much authority he still has after the modern general acceptance of his works as pseudepigrapha?
How much authority does Pseudo-Dionysus still have in today's Catholic Church?
The works of Dionysius were readily accepted by the medieval Scholastics. His works were not so highly valued during the the period of the Renaissance and thus broke with the time-honoured tradition of holding them in high esteem. There is too much uncertainty surrounding Dionysius the Pseudo-Areopagite and his writings for the Catholic Church to hold his works on the same level as say St. Augustine of Hippo.

By &quot;Dionysius the Areopagite&quot; is usually understood the judge of the Areopagus who, as related in Acts 17:34, was converted to Christianity by the preaching of St. Paul, and according to Dionysius of Corinth (Eusebius, Church History III.4) was Bishop of Athens.
In the course of time, however, two errors of far-reaching import arose in connection with this name. In the first place, a series of famous writings of a rather peculiar nature was ascribed to the Areopagite and, secondly, he was popularly identified with the holy martyr of Gaul, Dionysius, the first Bishop of Paris. It is not our purpose to take up directly the latter point; we shall concern ourselves here (1) with the person of the Pseudo-Areopagite; (2) with the classification, contents, and characteristics of his writing; (3) with their history and transmission; under this head the question as to the genuineness of, origin, first acceptance, and gradual spread of these writings will be answered.
Deep obscurity still hovers about the person of the Pseudo-Areopagite.
The doctrinal attitude of the Pseudo-Areopagite is not clearly defined. A certain vagueness, which was perhaps intended, is characteristic of his Christology, especially in the question concerning the two natures in Christ. We may well surmise that he was not a stranger to the latter, and rather modified, form of Monophysitism and that he belonged to that conciliatory group which sought, on the basis of the Henoticon issued in 482 by Emperor Zeno (Evagrius, Hist. Eccl., III, iv), to reconcile the extremes of orthodoxy and heresy. This reserved, indefinite attitude of the author explains the remarkable fact that opposite factions claimed him as an adherent. As to his social rank, a careful comparison of certain details scattered through his works shows that he belonged to the class of scholars who were known at the time as scholastikoi.
The fact must, indeed, appear remarkable that these very writings, though rejected outright by such an authority as Hypatius, were within little more than a century looked upon as genuine by Catholics, so that they could be used against the heretics during the Lateran Council in 649 (Hardouin III, 699 sqq.).
As to the second period, universal recognition of the Areopagitic writings in the Middle Ages, we need not mention the Greek Church, which is especially proud of him; but neither in the West was a voice raised in challenge down to the first half of the fifteenth century; on the contrary, his works were regarded as exceedingly valuable and even as sacred. It was believed that St. Paul, who had communicated his revelations to his disciple in Athens, spoke through these writings (Histor.-polit. Blatter, CXXV, 1900, p. 541).
The works of Dionysius, thus introduced into Western literature, were readily accepted by the medieval Scholastics. The great masters of Saint-Victor at Paris, foremost among them the much admired Hugh, based their teaching on the doctrine of Dionysius. Peter Lombard and the great Dominican and Franciscan scholars, Alexander of Hales, Albertus Magnus, Thomas Aquinas, Bonaventure, adopted his theses and arguments. Master poets, e.g. Dante, and historians, e.g. Otto of Freising, built on his foundations. Scholars as renowned as Robert Grosseteste of Lincoln and Vincent of Beauvais drew upon him freely. Popular religious books, such as the &quot;Legenda aurea&quot; of Giacomo da Voragine and the &quot;Life of Mary&quot; by Brother Philip, gave him a cordial welcome.
It was reserved for the period of the Renaissance to break with the time-honoured tradition. True, some of the older Humanists, as Pico della Mirandola, Marsilius Ficinus, and the Englishmen John Colet, were still convinced of the genuineness of the writings; but the keen and daring critic, Laurentius Valla (1407-1457) in his glosses to the New Testament, expressed his doubts quite openly and thereby gave the impulse, at first for the scholarly Erasmus (1504), and later on for the entire scientific world, to take sides either with or against Dionysius. The consequence was the formation of two camps; among the adversaries were not only Protestants (Luther, Scultetus, Dallaeus, etc.) but also prominent Catholic theologians (Beatus Rhenanus, Cajetan, Morinus, Sirmond, Petavius, Lequien, Le Nourry); among the defenders of Dionysius were Baronius, Bellarmine, Lansselius, Corderius, Halloix, Delario, de Rubeis, Lessius, Alexander Netalis, and others. The literary controversy assumed such dimensions and was carried on so vehemently that it can only be compared to the dispute concerning the Pseudo-Isidorian decretals and the pseudo-Constantinian donation. In the nineteenth century the general opinion inclined more and more towards the opposition; the Germans especially, Möhler, Fessler, Döllinger, Hergenröther, Alzog, Funk, and others made no reserve of their decision for the negative. At this juncture the scholarly professor Franz Hipler came forward and attempted to save the honor of Dionysius. He finds in Dionysius not a falsifier, but a prominent theologian of the fourth century who, through no fault of his own, but owing to the misinterpretation of some passages, was confounded with the Areopagite. Many Catholics, and many Protestants as well, voiced their approval. Finally, in 1895 there appeared almost simultaneously two independent researches, by Hugo Koch and by Joseph Stiglmayr, both of whom started from the same point and arrived at the same goal. The conclusion reached was that extracts from the treatise of the neo-Platonist Proclus, &quot;De malorum subsistentia&quot; (handed down in the Latin translation of Morbeka, Cousin ed., Paris, 1864), had been used by Dionysius in the treatise &quot;De div. nom.&quot; (c. iv, sections 19-35) A careful analysis brought to light an astonishing agreement of both works in arrangement, sequence of thought, examples, figures, and expressions. It is easy to point out many parallelisms from other and later writings of Proclus, e.g. from his &quot;Institutio theologica&quot;, &quot;theologia Platonica&quot;, and his commentary on Plato's &quot;Parmenides&quot;, &quot;Alcibiades I&quot;, and &quot;Timaeus&quot; (these five having been written after 462).
Accordingly, the long-standing problem seems to be solved in its most important phase. As a matter of fact, this is the decision pronounced by the most competent judges, such as Bardenhewer, Erhard, Funk, Diekamp, Rauschen, De Smedt, S.J., Duchesne, Battifol; and the Protestant scholars of early Christian literature, Gelzer, Harnack, Kruger, Bonwetsch. The chronology being thus determined, an explanation was readily found for the various objections hitherto alleged, viz. the silence of the early Fathers, the later dogmatic terminology, a developed monastic, ceremonial, and penitential system, the echo of neo-Platonism, etc. On the other hand it sets at rest many hypotheses which had been advanced concerning the author and his times and various discussions---whether, e.g., a certain Apollinaris, or Synesius, or Dionysius Alexandrinus, or a bishop of Ptolemais, or a pagan hierophant was the writer.
A critical edition of the text of the Areopagite is urgently needed. - Dionysius the Pseudo-Areopagite

Until many historical and doctrinal issues can be formerly resolved, the works of Dionysius the Pseudo-Areopagite will not enjoy a high amount of genuine authority within the Catholic Church these days.