THE TREATY OF PASSAROWITZ (1718): The Official Field Archive of the Joint Habsburg-Ottoman Boundary Commission

This spectacular archival find stands as an invaluable primary document charting the immediate structural implementation of the Treaty of Passarowitz, signed on July 21, 1718. Following the crushing military victories of Prince Eugene of Savoy against the forces of Sultan Ahmed III, the Habsburg Monarchy annexed the Banat, northern Serbia (including Belgrade), and Lesser Walachia. However, a treaty signed on parchment in a peace camp was merely a blueprint; the hazardous, highly volatile task of physically drawing the new imperial frontier and shifting municipal boundaries fell upon the Joint Border Commission (Granitz-Commission).

Representing the Roman Emperor Charles VI was Colonel Reinhard Wilhelm, Baron von Neipperg (later Imperial Field Marshal and negotiator of the 1739 Peace of Belgrade). Representing the Sublime Porte was the high-ranking Ottoman delegate Mustafa Pasha. Operating in active field camps along the immediate frontier, this archive preserves both the diplomatic maneuvers required to prevent a re-ignition of active border warfare and the immediate fiscal machinery engineered to absorb the war-torn Balkan borderlands into the imperial tax grid (Steuerkataster).

The first portion of the archive consists of two highly confidential, field-translated diplomatic letters tracking the dangerous operational logistics of the Joint Boundary Commission. Both documents were dictated by the Ottoman delegate Mustafa Pasha, translated on-site from Ottoman Turkish to German, and formally validated at the foot by the resident imperial camp dragoman, Johann Ferdinand Heinrich Forner.

Mustafa Pasha notifies the Austrian command that he intends to personally arrive at the strategic border post of Berza Palanka accompanied by a heavily monitored defensive escort of exactly 346 men (“mitbringend Zu pferd, Hussaren, und eggerer Seite in anzahl 346. Personen”). Reassuring the imperial command that his intentions are entirely peaceful, he confirms he has ordered his core military columns to remain behind downriver at Vidin (Widin) and has commanded several transport ships (Schiffe) to depart local waters to defuse regional friction. The reverse face bears a vital field-verification note: “NB: Dieses ist eine Copia so Von dem Türckischen Bericht in das Teütsch Versetzt worden, d[as] Türckische original ist auch Vorhanden,” proving this sheet was executed directly by dragoman Forner inside the camp to serve as the permanent operational record for Baron von Neipperg’s staff.

• Letter 2: The Parallel Operational Dispatch from a Field close to Vidin – Mustafa Pasha signs officially as “Mustapha Gubernator Zu Thessalonic” (Governor of Salonica).

This letter holds exceptional topographic value because it explicitly names the zero-point of the new imperial boundary line: “allwo der flüß Timok sich in die Donau ergieset” (where the river Timok empties into the Danube). The text records the precise moment the two empires set up their courier systems (Expresen) to rendezvous at this volatile river mouth, managing cross-border verification protocols to ensure that Ottoman supply vessels did not conflict with Austrian border pickets near the Iron Gates.

II. THE DUAL-VOLUME FIELD CENSUS & LAND-ROLLS (ITEMS 3 & 4)

Moving past the diplomatic correspondence, the accompanying twin-pamphlet field cadaster documents the raw economic and demographic calculations required to shift these borderlands out of Ottoman Timar structures and into the military-fiscal apparatus of the Austrian Empire (“Vom Merz d: A: 1719 Zuversteüren”). The expansive land-rolls map out dozens of contiguous frontier communities across multiple sectors—including the districts of Velka Sella, Battanja, Bela Crkva , etc. —against the phonetic German chancery spellings of local Slavic estate owners (such as Miloš, Blaško, Miladin, Radomir, Grotan, and Stojan). A feature of paramount historical and cartographic value is the explicit, on-the-ground tracking of properties caught directly in the crosshairs of the new boundary line. The surveyors recorded precise baseline field notes mapping out “Häüßer und Mühlen so Türkisch verblieben” (Houses and mills that remained Turkish), documenting a specific block of 18 houses and 1 mill locked under Ottoman jurisdiction within the border zone. The entire archive terminates in an absolute mathematical summary labeled Summa Summarum across all surveyed sectors. The final metrics track a regional economy of 14 defunct houses, 75 newly settled houses, 52 active tax-bearing houses, 7 functional watermills, 65 managed vineyards, 129 arable plots, and 170 meadows. Complemented by livestock tallies tracking 210 draft oxen and 460 sheep, this ledger culminates in an absolute calculated valuation of 82,125 financial units for the entire boundary district, providing an invaluable, unrecorded quantitative dataset for early modern economic historians.

Dragoman Johann Ferdinand Heinrich Forner

The translations from Ottoman were made by Johann Ferdinand Heinrich Forner (latinized as Joannes Ferdinandus Henricus Forner). He was a highly skilled Austrian linguist who operated at the vital intersection of European diplomacy and the Islamic world during the early 18th century. As an official interpreter, or dragoman, he served as a crucial linguistic bridge for the Austrian government, managing the complex flow of state documents, treaties, and intelligence between the Sublime Porte and Vienna. Highly proficient in Ottoman Turkish, Arabic, and Persian, Forner belonged to a pioneering generation of Catholic scholars trained to break Austria’s reliance on native Ottoman subjects.

His major historical milestone occurred during the 1719–1720 Imperial Embassy. In 1719, following the to ratify peace and establish trade. Led by the Imperial Internuncio and Ambassador, Damian Hugo von Virmont, this high-level diplomatic mission required exceptional administrative and linguistic support. Forner was selected to join the expedition as an official interpreter, tasked with translating sensitive diplomatic documents and assisting in complex negotiations.

Operating in the intense, crowded diplomatic quarter of Pera in Constantinople was grueling work. Diplomatic dispatches held in Austrian archives record a specific incident involving Forner during this journey: a letter sent by Ambassador Virmont to the Aulic War Council (Hofkriegsrat) in Vienna, dated January 29, 1720, explicitly reports on the “illness of the interpreter Forner” while they were stationed in Pera. Forner survived the illness and continued his vital service.

Beyond his political utility to the Austrian state, Forner left a lasting physical mark on the historical record through his legacy in Ottoman manuscripts. A 17th/18th-century Turkish manuscript once owned by him—proudly bearing his handwritten inscription, Joannes Ferdinandus Henricus Forner—survived through the centuries and eventually found its way into the famous John Rylands University Library collection, serving as enduring proof of his scholarly life and early Austrian orientalism.

The Note on Rarity

Field archives, katasters, and bilingual diplomatic letters generated by the 1718 Joint Boundary Commission are of extreme historical scarcity. While finalized topographic maps of the Passarowitz frontier are preserved in specialized state cartographic archives in Vienna (Kriegsarchiv), the raw, field worksheets and correspondence that guided their hands are practically unrecorded on the commercial market.

References: Unrecorded.