It was during his time as Bishop that Innocent II issues a bull giving the metropolitan power over Poland to the Archbishopric of Magdeburg.

This was annulled in 1136 when Innocent II restored as Gniezno with archbishop authority.

[4] His death was recorded in the Lubiński obituary on the day of 23 September.

On 7 July 1136 Pope Innocent II granted Archbishop Jacob twenty-nine villages in Pałuki and the town of Żnin, which also became property of the Roman Catholic Church.

This article about a Polish Catholic bishop or archbishop is a stub.