24mo. 380 p., engraved title. Overlapping vellum 11 cm (Ref: Breugelmans p. 364, 1634:4) (Details: 2 thongs laced through the joints. Short title in ink on the back. The engraved title depitcts the emperor of the Holy Roman Empire on his throne, with his regalia. The lower part of the title is adorned by 7 coats of arms of German states) (Condition: Vellum age-tanned. Ink stain on the back. Small inscription on recto of front flyleaf. Upper margin of the title slightly stained, and showing an old ownership entry. A small stamp on the lower margin of the recto side of the second leaf. Four new brown ribbons attached to the covers) (Note: The German diplomat and jurist Jacobus Lampadius (Jakob Lampe), 1593-1649, conducted a lively correspondence with Conring, Althusius, Grotius, Georg Calixt et alii. His theory of constitutional law, which contributed to the further development of the prevailing dualism in the Holy Roman Empire into a system of federate states in accordance with a shared sovereignty between the Emperor and the German lands, has become, with adaptions to the peace of Westphalia of 1648, which ended the thirty years' war in Germany, made by Conring and later by Kulpis, a widely read standard work on the constitutional relations in Germany during the second half of the 17th century. It was first published in 1621 as 'Dissertatio de jurisdictione in Imperio nostro Romano-Germanico'. H. Conring (Conringius) produced in 1630 an augmented and revised edition under the title of 'De constitutione reipublicae Romano-Germanicae'. The Leiden publisher Maire brought Conring's edition on the market as 'Tractatus de Constitutione Imperii Romano-Germanici'. (NDB 13, 454/56)) (Provenance: On the front flyleaf: 'C. desars, 1654'. This name is repeated in smaller type on the title. On the verso of the title in faint ink: 'Ex libris Jacobs'. On the recto of leaf A2 a small stamp: 'Albert Conrot, Luxembourg'. On the internet we found one Albert Conrot, 'industriel à Luxembourg', corresponding member of the 'Institut Archéologique de Luxembourg'. He died in 1904) (Collation: A-2A8 (minus the blank leaves 2A7 & 2A8) (Photographs on request)