In 1575 he joined the pro-Habsburg camp and together with some other Polish senators he proclaimed Emperor Maximilian II to be the king of Poland, however due to opposition from many other Polish nobles (szlachta) Maximilian lost, and Stephen Báthory was eventually to become the king of Poland.
In 1575, he joined the pro-Habsburg group and along with other Polish senators, they proclaimed Emperor Maximilian II as the king of Poland. Despite opposition from many Polish nobles (szlachta), Maximilian failed to secure the title, and Stephen Báthory was ultimately crowned king of Poland.