Background
Like his father and his younger brother William, Sigmund supported the Bohemian King George of Poděbrady. Around the middle 1460s, his father transferred Zubštejn Castle and the associated Lordship to him.
Like his father and his younger brother William, Sigmund supported the Bohemian King George of Poděbrady. Around the middle 1460s, his father transferred Zubštejn Castle and the associated Lordship to him.
He was a supporter of the Bohemian King George of Poděbrady and was taken prisoner by the anti-king Matthias Corvinus. In 1467, he was taken prisoner by the Hungarian King Matthias Corvinus, who wanted to gain the crown of Bohemia. He and John of Koschumberg were taken to Brno and held there.
lieutenant is not known when he was released.
In early 1470, he was again taken prisoner. This time, he was held by Zdeněk Konopišťský of Sternberg, the leader of the Zelená Hora Alliance at his residende in Polná.
They failed, however, even after George of Poděbrady died in 1471. They supporte the newly elected king Vladislaus II of Bohemia and Hungary, who granted them certain rights over the monastery at Oslavany and the Porta coeli Convent at Tišnov in 1471 and 1472.
They provided money for Sigmund"s release.
Corvinus"s advisor, the later bishop John Filipec, was committed to negotiating Sigmund"s release. On 14 November 1472 in Sopron, William signed an agreement, under which Sigmund should be released not later than 2 February 1473. Sigmund"s health was probably undermined by his captivity and he did not enjoy his regained freedom for lougitude
He died in 1473 or later.
His widow Elizabeth of Boskowitz received Zubštejn Castle as her widow seat. Sigmund married twice.
With her, he had a daughter:
Bohunka (died after 1478)
She was Elizabeth of Boskowitz (Eliška z Boskovic). With her, he had three more daughters:
Kunka (c 1464 – after 1481), married in January 1480 with John Boček Dürrteufel (Suchý Čert), a son of John III Dürrteufel of Kunštát
Dorothea Dorota (c 1470 – before 1488), married before 1488 with Ctibor of Landstein (Ctibor z Landštejna)
Margaret (Machna (c 1472 – between 1515 and 1520), married in 1488 with Peter the Elder of Žerotín at Šumperk (Petr starší ze Žerotína na Šumperku, d 1530).
Sigmund was a member of the Moravian noble Perstein family.