Henricus Blyssen (Henricus Blyssemii) - Tractatus Henrici Blyssemii Societatis lesu de unigenoque sacrae Eucharisticae synaxeos salubriter - 1585

It is a Catholic theological treatise on the Eucharist.
The text discusses:
• the rite of communion
• the theological significance of the Eucharist
• the defense of Catholic doctrine against theological errors of the period (in the midst of the Counter-Reformation)
• biblical quotations and the Fathers of the Church
The dedication that can be seen on the page:
"Serenissimo et Illustrissimo Principi ac Domino D. Carolo Archiduci Austriae..."
means that the book is dedicated to Charles d'Austria, archduke of the House of Habsburg.
the book has a soft parchment binding
291 pages, 20 of which are index, 8 before the preface