Complex sentence: On 8 December 1506 during the session of the Polish Senate in Piotrków, Sigismund was elected King of Poland and arrived in Kraków on 20 January 1507 and was crowned four days later in Wawel Cathedral by Primate Andrzej Boryszewski.
Split into simpler sentences: On 8 December 1506 during the session of the Polish Senate in Piotrków, Sigismund was elected King of Poland. He arrived in Kraków on 20 January 1507 and was crowned four days later in Wawel Cathedral by Primate Andrzej Boryszewski.