The critical edition of the works of Gregory of Nyssa contains the letters of this famous fourth-century Church Father, edited by Giorgio Pasquali. Pasquali’s edition was originally published in 1925, and (slightly emendated by Werner Jaeger) reprinted as part of the Gregorii Nysseni Opera in 1959. Gregory of Nyssa had a considerable influence on the thinking of his time with his philosophical and theological ideas, especially on the mystical tradition of the Eastern Churches. In these 30 letters, addressed to his Christian and non-Christian contemporaries and covering a variety of topics, he again shows his spiritual and intellectual sharpnes, as well as his masterly use of the Greek language. This meticulously produced edition features an extensive (Latin) preface, critical apparatus, and an Index of Names. It also contains a list of errata, especially prepared for this reprint.