The Treaty of Drohiczyn was concluded on 14 January 1581, during the Livonian War

Livonian War

The Livonian War was fought for control of Old Livonia in the territory of present-day Estonia and Latvia when the Tsardom of Russia faced a varying coalition of Denmark–Norway, the Kingdom of Sweden, the Union of the Grand Duchy of Lithuania and the Kingdom of Poland.During the period 1558–1578,...

, between the city of Riga

Riga

Riga is the capital and largest city of Latvia. With 702,891 inhabitants Riga is the largest city of the Baltic states, one of the largest cities in Northern Europe and home to more than one third of Latvia's population. The city is an important seaport and a major industrial, commercial,...

 and the Polish-Lithuanian Commonwealth

Polish-Lithuanian Commonwealth

The Polish–Lithuanian Commonwealth was a dualistic state of Poland and Lithuania ruled by a common monarch. It was the largest and one of the most populous countries of 16th- and 17th‑century Europe with some and a multi-ethnic population of 11 million at its peak in the early 17th century...

. The former Free imperial city

Free Imperial City

In the Holy Roman Empire, a free imperial city was a city formally ruled by the emperor only — as opposed to the majority of cities in the Empire, which were governed by one of the many princes of the Empire, such as dukes or prince-bishops...

 Riga

Riga

Riga is the capital and largest city of Latvia. With 702,891 inhabitants Riga is the largest city of the Baltic states, one of the largest cities in Northern Europe and home to more than one third of Latvia's population. The city is an important seaport and a major industrial, commercial,...

 was added to Polish-Lithuanian Livonia

Treaty of Vilnius (1561)

The Treaty of Vilnius or Vilna was concluded on 28 November 1561, during the Livonian War, between the Livonian Confederation and the Polish-Lithuanian Commonwealth at Vilnius...

. Its freedoms and privileges were in part confirmed in the Corpus Privilegiorum Stephanorum, but also limited. One of its burgomaster

Burgomaster

Burgomaster is the English form of various terms in or derived from Germanic languages for the chief magistrate or chairman of the executive council of a sub-national level of administration...

s was to be appointed Burggraf, the Polish-Lithuanian official in town. Changes to the city's statutes required Royal approval. The Augsburg Confession

Augsburg Confession

The Augsburg Confession, also known as the "Augustana" from its Latin name, Confessio Augustana, is the primary confession of faith of the Lutheran Church and one of the most important documents of the Lutheran reformation...

was tolerated, but the city was deprived of the means to veto Royal interventions in its ecclesiastical affairs.

Sources