Adalbert of Magdeburg, sometimes incorrectly shortened to "Albert" (c. 910 - 20 June 981), and known as the
Apostle of the Slavs, was the first
Archbishop of Magdeburg (from 968) and a successful missionary to the
Polabian Slavs to the east of what is contemporarily
Germany. He was later
canonised and his liturgical feast day was assigned as 20 June.