Wenceslaus I of Bohemia
Bolesław's first coins were issued around 995. One of them bore the inscription Vencievlavus, showing that he regarded his mother's uncle Duke Wenceslaus I of Bohemia as the patron saint of Poland. Bolesław sent reinforcements to the Holy Roman Empire to fight against the Polabian Slavs in summer 992. Bolesław personally led a Polish army to assist the imperial troops in invading the land of the Abodrites or Veleti in 995. During the campaign, he met the young German monarch, Otto III.