Power should be in the hands of the competent and the responsible. This, without a doubt, is why 16th-century Poznań burghers twice entrusted the office of city mayor to Józef Struś (Josephus Struthius). Struś was educated in the Lubrański Academy and then in the Kraków Academy and in Padua, where he studied medicine. His medical advice was sought by such famed figures of the time as King Zygmunt August, Sultan Suleiman the Magnificent of Turkey and King Philip II of Spain. Józef Struś authored Treatise on the Pulse, which was the world’s first publication on the topic. He died in Poznań helping the city’s residents during an epidemic of bubonic plague.