Jacobus Colyer

Jacobus Colyer ( 1657 – 6 March 1725) was a Dutch politician and diplomat, who represented the Dutch Republic at the Sublime Porte.

Early life Colyer was born before 18 February 1657. He was the eldest son of Justinus Colyer and Maria Engelbert. His sister, Clara Catharina Colyer, married Daniël Johan de Hochepied, the Dutch Consul at Smyrna, from 1688 to 1723, who was created Magnate and Baron de Hochepied in 1704 by Leopold I, Emperor of Germany, under the great seal of the Kingdom of Hungary.

His nephew, Elbert de Hochepied, 2nd Baron de Hochepied, also served as the Dutch ambassador to the Ottoman Empire from 1747 to 1763. (Between 1639 and 1668, several Dutch diplomats resided in Constantinople, but none were granted the official position of ambassador.) The Treaty marked the end of Ottoman control in much of Central Europe, with their first major territorial losses, beginning the reversal of four centuries of expansion, and established the Habsburg monarchy as the dominant power of the region.

In gratitude for his efforts, he was created a Count of the Holy Roman Empire and was granted the title Duke of Hungary by the Habsburg King Leopold I in 1699.

Treaty of Passarowitz After war resumed again in the early 18th century, Colyer was asked to return to Serbia for a second time in 1718 to broker yet another peace, known as the Treaty of Passarowitz between the Ottoman Empire and Austria of the Habsburg monarchy and the Republic of Venice. The treaty, signed in Požarevac on 21 July 1718, which saw the cession of several Ottoman territories to the Habsburgs, and, at the time, was regarded as an extraordinary success and source of pride in Vienna.

Personal life In 1713 Colyer married Catharina de Bourg.

Colyer died at Pera on 6 March 1725.