Jordan was the first Bishop of Poland from 968 with his seat, most probably, in 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 an Italian

Italian people

The Italian people are an ethnic group that share a common Italian culture, ancestry and speak the Italian language as a mother tongue. Within Italy, Italians are defined by citizenship, regardless of ancestry or country of residence , and are distinguished from people...

 or German.

Most evidence shows that he was missionary bishop subordinate directly to the Pope

Pope

The Pope is the Bishop of Rome, a position that makes him the leader of the worldwide Catholic Church . In the Catholic Church, the Pope is regarded as the successor of Saint Peter, the Apostle...

. He arrived in Poland, probably from Italy

Italy

Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

 or the Rhineland

Rhineland

Historically, the Rhinelands refers to a loosely-defined region embracing the land on either bank of the River Rhine in central Europe....

, in 966 with Dubrawka

Dubrawka

Dobrawa was a Bohemian princess member of the Přemyslid dynasty and by marriage Duchess of the Polans.She was the daughter of Boleslav I the Cruel, Duke of Bohemia, by his wife Biagota....

 to baptise Mieszko I of Poland

Mieszko I of Poland

Mieszko I , was a Duke of the Polans from about 960 until his death. A member of the Piast dynasty, he was son of Siemomysł; grandchild of Lestek; father of Bolesław I the Brave, the first crowned King of Poland; likely father of Świętosława , a Nordic Queen; and grandfather of her son, Cnut the...

. After the death of Jordan until 992 the throne of the Bishop of Poland was vacant, or there was a bishop of unknown name (the first theory is more probable). His successor, from 992, was Unger.