Jakub Ostroróg was a prominent 16th-century Polish magnate and politician from Poznań

Poznan

Poznań is a city on the Warta river in west-central Poland, with a population of 556,022 in June 2009. It is among the oldest cities in Poland, and was one of the most important centres in the early Polish state, whose first rulers were buried at Poznań's cathedral. It is sometimes claimed to be...

. He was one of the main leaders of the community of Bohemian Brethren, who were followers of Jan Hus

Jan Hus

Jan Hus , often referred to in English as John Hus or John Huss, was a Czech priest, philosopher, reformer, and master at Charles University in Prague...

, in the area. After his appointment as Starosta

Starosta

Starost is a title for an official or unofficial position of leadership that has been used in various contexts through most of Slavic history. It can be translated as "elder"...

General of Poznań (1566), the influence of local magnates, who generally supported Protestant causes, on the affairs of Poland's royal cities increased markedly. Under his patronage the Protestant community in Poznań expanded, although it subsequently declined over the course of the 17th century, after his death.

He was a major supporter of the Executionist movement.

He owned property in Ostroróg

Ostroróg

Ostroróg is a town in Szamotuły County, Greater Poland Voivodeship, Poland, with 1,993 inhabitants .- History :First mentioned in 1383. City's location before 1412, confirmed by the king , Sigismund I the Old ....

, a village located about 47 kilometers northwest of Poznań, which was used as a residence of the seniors of the Bohemian Brethren movement.