Martin Siebenbürger

Martin Siebenbürger (c. 1475–1522), born Mert Kapp in Hermannstadt in Transylvania, followed his uncle to Vienna, where he taught law at the university and became the city's judge in 1512. His relentless prosecution of corruption among municipal officials in the Lauffner affair earned him powerful enemies, who denounced him to Emperor Maximilian I.

In 1520 the city council made him mayor of Vienna. He sought to preserve the city's autonomy, but after Archduke Ferdinand took over Austria, he was tried with five former councillors at the Wiener Neustadt blood court, condemned, and beheaded on 11 August 1522.